21842156

素因数分解:

$2^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{10987}}^1$

素因数の和:11069

約数の個数: 24

約数和(自身を含む): 44303616

約数和(自身を除く): 22461460

約数列:

[1, 2, 4, 7, 14, 28, 71, 142, 284, 497, 994, 1988, 10987, 21974, 43948, 76909, 153818, 307636, 780077, 1560154, 3120308, 5460539, 10921078, 21842156]

約数ペア:

[(1, 21842156), (2, 10921078), (4, 5460539), (7, 3120308), (14, 1560154), (28, 780077), (71, 307636), (142, 153818), (284, 76909), (497, 43948), (994, 21974), (1988, 10987)]