21000940205

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1979}}^1\times {\mathrm{6451}}^1$

素因数の和:8489

約数の個数: 32

約数和(自身を含む): 29433507840

約数和(自身を除く): 8432567635

約数列:

[1, 5, 7, 35, 47, 235, 329, 1645, 1979, 6451, 9895, 13853, 32255, 45157, 69265, 93013, 225785, 303197, 465065, 651091, 1515985, 2122379, 3255455, 10611895, 12766529, 63832645, 89365703, 446828515, 600026863, 3000134315, 4200188041, 21000940205]

約数ペア:

[(1, 21000940205), (5, 4200188041), (7, 3000134315), (35, 600026863), (47, 446828515), (235, 89365703), (329, 63832645), (1645, 12766529), (1979, 10611895), (6451, 3255455), (9895, 2122379), (13853, 1515985), (32255, 651091), (45157, 465065), (69265, 303197), (93013, 225785)]