20729870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 44706816

約数和(自身を除く): 23976946

約数列:

[1, 2, 5, 7, 10, 14, 35, 43, 70, 71, 86, 97, 142, 194, 215, 301, 355, 430, 485, 497, 602, 679, 710, 970, 994, 1358, 1505, 2485, 3010, 3053, 3395, 4171, 4970, 6106, 6790, 6887, 8342, 13774, 15265, 20855, 21371, 29197, 30530, 34435, 41710, 42742, 48209, 58394, 68870, 96418, 106855, 145985, 213710, 241045, 291970, 296141, 482090, 592282, 1480705, 2072987, 2961410, 4145974, 10364935, 20729870]

約数ペア:

[(1, 20729870), (2, 10364935), (5, 4145974), (7, 2961410), (10, 2072987), (14, 1480705), (35, 592282), (43, 482090), (70, 296141), (71, 291970), (86, 241045), (97, 213710), (142, 145985), (194, 106855), (215, 96418), (301, 68870), (355, 58394), (430, 48209), (485, 42742), (497, 41710), (602, 34435), (679, 30530), (710, 29197), (970, 21371), (994, 20855), (1358, 15265), (1505, 13774), (2485, 8342), (3010, 6887), (3053, 6790), (3395, 6106), (4171, 4970)]