20505240

素因数分解:

$2^3\times 3^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:206

約数の個数: 192

約数和(自身を含む): 77875200

約数和(自身を除く): 57369960

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 56, 60, 63, 70, 72, 79, 84, 90, 103, 105, 120, 126, 140, 158, 168, 180, 206, 210, 237, 252, 280, 309, 315, 316, 360, 395, 412, 420, 474, 504, 515, 553, 618, 630, 632, 711, 721, 790, 824, 840, 927, 948, 1030, 1106, 1185, 1236, 1260, 1422, 1442, 1545, 1580, 1659, 1854, 1896, 2060, 2163, 2212, 2370, 2472, 2520, 2765, 2844, 2884, 3090, 3160, 3318, 3555, 3605, 3708, 4120, 4326, 4424, 4635, 4740, 4977, 5530, 5688, 5768, 6180, 6489, 6636, 7110, 7210, 7416, 8137, 8295, 8652, 9270, 9480, 9954, 10815, 11060, 12360, 12978, 13272, 14220, 14420, 16274, 16590, 17304, 18540, 19908, 21630, 22120, 24411, 24885, 25956, 28440, 28840, 32445, 32548, 33180, 37080, 39816, 40685, 43260, 48822, 49770, 51912, 56959, 64890, 65096, 66360, 73233, 81370, 86520, 97644, 99540, 113918, 122055, 129780, 146466, 162740, 170877, 195288, 199080, 227836, 244110, 259560, 284795, 292932, 325480, 341754, 366165, 455672, 488220, 512631, 569590, 585864, 683508, 732330, 854385, 976440, 1025262, 1139180, 1367016, 1464660, 1708770, 2050524, 2278360, 2563155, 2929320, 3417540, 4101048, 5126310, 6835080, 10252620, 20505240]

約数ペア:

[(1, 20505240), (2, 10252620), (3, 6835080), (4, 5126310), (5, 4101048), (6, 3417540), (7, 2929320), (8, 2563155), (9, 2278360), (10, 2050524), (12, 1708770), (14, 1464660), (15, 1367016), (18, 1139180), (20, 1025262), (21, 976440), (24, 854385), (28, 732330), (30, 683508), (35, 585864), (36, 569590), (40, 512631), (42, 488220), (45, 455672), (56, 366165), (60, 341754), (63, 325480), (70, 292932), (72, 284795), (79, 259560), (84, 244110), (90, 227836), (103, 199080), (105, 195288), (120, 170877), (126, 162740), (140, 146466), (158, 129780), (168, 122055), (180, 113918), (206, 99540), (210, 97644), (237, 86520), (252, 81370), (280, 73233), (309, 66360), (315, 65096), (316, 64890), (360, 56959), (395, 51912), (412, 49770), (420, 48822), (474, 43260), (504, 40685), (515, 39816), (553, 37080), (618, 33180), (630, 32548), (632, 32445), (711, 28840), (721, 28440), (790, 25956), (824, 24885), (840, 24411), (927, 22120), (948, 21630), (1030, 19908), (1106, 18540), (1185, 17304), (1236, 16590), (1260, 16274), (1422, 14420), (1442, 14220), (1545, 13272), (1580, 12978), (1659, 12360), (1854, 11060), (1896, 10815), (2060, 9954), (2163, 9480), (2212, 9270), (2370, 8652), (2472, 8295), (2520, 8137), (2765, 7416), (2844, 7210), (2884, 7110), (3090, 6636), (3160, 6489), (3318, 6180), (3555, 5768), (3605, 5688), (3708, 5530), (4120, 4977), (4326, 4740), (4424, 4635)]