21322760

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31357}}^1$

素因数の和:31385

約数の個数: 32

約数和(自身を含む): 50799960

約数和(自身を除く): 29477200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31357, 62714, 125428, 156785, 250856, 313570, 533069, 627140, 1066138, 1254280, 2132276, 2665345, 4264552, 5330690, 10661380, 21322760]

約数ペア:

[(1, 21322760), (2, 10661380), (4, 5330690), (5, 4264552), (8, 2665345), (10, 2132276), (17, 1254280), (20, 1066138), (34, 627140), (40, 533069), (68, 313570), (85, 250856), (136, 156785), (170, 125428), (340, 62714), (680, 31357)]