21091970

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{487}}^1$

素因数の和:626

約数の個数: 32

約数和(自身を含む): 39211776

約数和(自身を除く): 18119806

約数列:

[1, 2, 5, 10, 61, 71, 122, 142, 305, 355, 487, 610, 710, 974, 2435, 4331, 4870, 8662, 21655, 29707, 34577, 43310, 59414, 69154, 148535, 172885, 297070, 345770, 2109197, 4218394, 10545985, 21091970]

約数ペア:

[(1, 21091970), (2, 10545985), (5, 4218394), (10, 2109197), (61, 345770), (71, 297070), (122, 172885), (142, 148535), (305, 69154), (355, 59414), (487, 43310), (610, 34577), (710, 29707), (974, 21655), (2435, 8662), (4331, 4870)]