20785380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{409}}^1$

素因数の和:450

約数の個数: 144

約数和(自身を含む): 73288320

約数和(自身を除く): 52502940

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15, 20, 21, 22, 28, 30, 33, 35, 42, 44, 55, 60, 66, 70, 77, 84, 105, 110, 121, 132, 140, 154, 165, 210, 220, 231, 242, 308, 330, 363, 385, 409, 420, 462, 484, 605, 660, 726, 770, 818, 847, 924, 1155, 1210, 1227, 1452, 1540, 1636, 1694, 1815, 2045, 2310, 2420, 2454, 2541, 2863, 3388, 3630, 4090, 4235, 4499, 4620, 4908, 5082, 5726, 6135, 7260, 8180, 8470, 8589, 8998, 10164, 11452, 12270, 12705, 13497, 14315, 16940, 17178, 17996, 22495, 24540, 25410, 26994, 28630, 31493, 34356, 42945, 44990, 49489, 50820, 53988, 57260, 62986, 67485, 85890, 89980, 94479, 98978, 125972, 134970, 148467, 157465, 171780, 188958, 197956, 247445, 269940, 296934, 314930, 346423, 377916, 472395, 494890, 593868, 629860, 692846, 742335, 944790, 989780, 1039269, 1385692, 1484670, 1732115, 1889580, 2078538, 2969340, 3464230, 4157076, 5196345, 6928460, 10392690, 20785380]

約数ペア:

[(1, 20785380), (2, 10392690), (3, 6928460), (4, 5196345), (5, 4157076), (6, 3464230), (7, 2969340), (10, 2078538), (11, 1889580), (12, 1732115), (14, 1484670), (15, 1385692), (20, 1039269), (21, 989780), (22, 944790), (28, 742335), (30, 692846), (33, 629860), (35, 593868), (42, 494890), (44, 472395), (55, 377916), (60, 346423), (66, 314930), (70, 296934), (77, 269940), (84, 247445), (105, 197956), (110, 188958), (121, 171780), (132, 157465), (140, 148467), (154, 134970), (165, 125972), (210, 98978), (220, 94479), (231, 89980), (242, 85890), (308, 67485), (330, 62986), (363, 57260), (385, 53988), (409, 50820), (420, 49489), (462, 44990), (484, 42945), (605, 34356), (660, 31493), (726, 28630), (770, 26994), (818, 25410), (847, 24540), (924, 22495), (1155, 17996), (1210, 17178), (1227, 16940), (1452, 14315), (1540, 13497), (1636, 12705), (1694, 12270), (1815, 11452), (2045, 10164), (2310, 8998), (2420, 8589), (2454, 8470), (2541, 8180), (2863, 7260), (3388, 6135), (3630, 5726), (4090, 5082), (4235, 4908), (4499, 4620)]