21209456

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{701}}^1$

素因数の和:801

約数の個数: 40

約数和(自身を含む): 43175808

約数和(自身を除く): 21966352

約数列:

[1, 2, 4, 8, 16, 31, 61, 62, 122, 124, 244, 248, 488, 496, 701, 976, 1402, 1891, 2804, 3782, 5608, 7564, 11216, 15128, 21731, 30256, 42761, 43462, 85522, 86924, 171044, 173848, 342088, 347696, 684176, 1325591, 2651182, 5302364, 10604728, 21209456]

約数ペア:

[(1, 21209456), (2, 10604728), (4, 5302364), (8, 2651182), (16, 1325591), (31, 684176), (61, 347696), (62, 342088), (122, 173848), (124, 171044), (244, 86924), (248, 85522), (488, 43462), (496, 42761), (701, 30256), (976, 21731), (1402, 15128), (1891, 11216), (2804, 7564), (3782, 5608)]