21721406

素因数分解:

$2^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{7643}}^1$

素因数の和:7688

約数の個数: 24

約数和(自身を含む): 39213720

約数和(自身を除く): 17492314

約数列:

[1, 2, 7, 14, 29, 49, 58, 98, 203, 406, 1421, 2842, 7643, 15286, 53501, 107002, 221647, 374507, 443294, 749014, 1551529, 3103058, 10860703, 21721406]

約数ペア:

[(1, 21721406), (2, 10860703), (7, 3103058), (14, 1551529), (29, 749014), (49, 443294), (58, 374507), (98, 221647), (203, 107002), (406, 53501), (1421, 15286), (2842, 7643)]