20461980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:176

約数の個数: 192

約数和(自身を含む): 73801728

約数和(自身を除く): 53339748

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 43, 44, 55, 60, 66, 70, 77, 84, 86, 103, 105, 110, 129, 132, 140, 154, 165, 172, 206, 210, 215, 220, 231, 258, 301, 308, 309, 330, 385, 412, 420, 430, 462, 473, 515, 516, 602, 618, 645, 660, 721, 770, 860, 903, 924, 946, 1030, 1133, 1155, 1204, 1236, 1290, 1419, 1442, 1505, 1540, 1545, 1806, 1892, 2060, 2163, 2266, 2310, 2365, 2580, 2838, 2884, 3010, 3090, 3311, 3399, 3605, 3612, 4326, 4429, 4515, 4532, 4620, 4730, 5665, 5676, 6020, 6180, 6622, 6798, 7095, 7210, 7931, 8652, 8858, 9030, 9460, 9933, 10815, 11330, 13244, 13287, 13596, 14190, 14420, 15862, 16555, 16995, 17716, 18060, 19866, 21630, 22145, 22660, 23793, 26574, 28380, 31003, 31724, 33110, 33990, 39655, 39732, 43260, 44290, 47586, 48719, 49665, 53148, 62006, 66220, 66435, 67980, 79310, 88580, 93009, 95172, 97438, 99330, 118965, 124012, 132870, 146157, 155015, 158620, 186018, 194876, 198660, 237930, 243595, 265740, 292314, 310030, 341033, 372036, 465045, 475860, 487190, 584628, 620060, 682066, 730785, 930090, 974380, 1023099, 1364132, 1461570, 1705165, 1860180, 2046198, 2923140, 3410330, 4092396, 5115495, 6820660, 10230990, 20461980]

約数ペア:

[(1, 20461980), (2, 10230990), (3, 6820660), (4, 5115495), (5, 4092396), (6, 3410330), (7, 2923140), (10, 2046198), (11, 1860180), (12, 1705165), (14, 1461570), (15, 1364132), (20, 1023099), (21, 974380), (22, 930090), (28, 730785), (30, 682066), (33, 620060), (35, 584628), (42, 487190), (43, 475860), (44, 465045), (55, 372036), (60, 341033), (66, 310030), (70, 292314), (77, 265740), (84, 243595), (86, 237930), (103, 198660), (105, 194876), (110, 186018), (129, 158620), (132, 155015), (140, 146157), (154, 132870), (165, 124012), (172, 118965), (206, 99330), (210, 97438), (215, 95172), (220, 93009), (231, 88580), (258, 79310), (301, 67980), (308, 66435), (309, 66220), (330, 62006), (385, 53148), (412, 49665), (420, 48719), (430, 47586), (462, 44290), (473, 43260), (515, 39732), (516, 39655), (602, 33990), (618, 33110), (645, 31724), (660, 31003), (721, 28380), (770, 26574), (860, 23793), (903, 22660), (924, 22145), (946, 21630), (1030, 19866), (1133, 18060), (1155, 17716), (1204, 16995), (1236, 16555), (1290, 15862), (1419, 14420), (1442, 14190), (1505, 13596), (1540, 13287), (1545, 13244), (1806, 11330), (1892, 10815), (2060, 9933), (2163, 9460), (2266, 9030), (2310, 8858), (2365, 8652), (2580, 7931), (2838, 7210), (2884, 7095), (3010, 6798), (3090, 6622), (3311, 6180), (3399, 6020), (3605, 5676), (3612, 5665), (4326, 4730), (4429, 4620), (4515, 4532)]