20481370

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:415

約数の個数: 64

約数和(自身を含む): 46158336

約数和(自身を除く): 25676966

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 71, 91, 130, 142, 182, 317, 355, 455, 497, 634, 710, 910, 923, 994, 1585, 1846, 2219, 2485, 3170, 4121, 4438, 4615, 4970, 6461, 8242, 9230, 11095, 12922, 20605, 22190, 22507, 28847, 32305, 41210, 45014, 57694, 64610, 112535, 144235, 157549, 225070, 288470, 292591, 315098, 585182, 787745, 1462955, 1575490, 2048137, 2925910, 4096274, 10240685, 20481370]

約数ペア:

[(1, 20481370), (2, 10240685), (5, 4096274), (7, 2925910), (10, 2048137), (13, 1575490), (14, 1462955), (26, 787745), (35, 585182), (65, 315098), (70, 292591), (71, 288470), (91, 225070), (130, 157549), (142, 144235), (182, 112535), (317, 64610), (355, 57694), (455, 45014), (497, 41210), (634, 32305), (710, 28847), (910, 22507), (923, 22190), (994, 20605), (1585, 12922), (1846, 11095), (2219, 9230), (2485, 8242), (3170, 6461), (4121, 4970), (4438, 4615)]