21405638

素因数分解:

$2^1\times {\mathrm{109}}^1\times {\mathrm{149}}^1\times {\mathrm{659}}^1$

素因数の和:919

約数の個数: 16

約数和(自身を含む): 32670000

約数和(自身を除く): 11264362

約数列:

[1, 2, 109, 149, 218, 298, 659, 1318, 16241, 32482, 71831, 98191, 143662, 196382, 10702819, 21405638]

約数ペア:

[(1, 21405638), (2, 10702819), (109, 196382), (149, 143662), (218, 98191), (298, 71831), (659, 32482), (1318, 16241)]