21547640

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8831}}^1$

素因数の和:8903

約数の個数: 32

約数和(自身を含む): 49282560

約数和(自身を除く): 27734920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8831, 17662, 35324, 44155, 70648, 88310, 176620, 353240, 538691, 1077382, 2154764, 2693455, 4309528, 5386910, 10773820, 21547640]

約数ペア:

[(1, 21547640), (2, 10773820), (4, 5386910), (5, 4309528), (8, 2693455), (10, 2154764), (20, 1077382), (40, 538691), (61, 353240), (122, 176620), (244, 88310), (305, 70648), (488, 44155), (610, 35324), (1220, 17662), (2440, 8831)]