21440978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{179}}^1\times {\mathrm{271}}^1$

素因数の和:482

約数の個数: 32

約数和(自身を含む): 37013760

約数和(自身を除く): 15572782

約数列:

[1, 2, 13, 17, 26, 34, 179, 221, 271, 358, 442, 542, 2327, 3043, 3523, 4607, 4654, 6086, 7046, 9214, 39559, 48509, 59891, 79118, 97018, 119782, 630617, 824653, 1261234, 1649306, 10720489, 21440978]

約数ペア:

[(1, 21440978), (2, 10720489), (13, 1649306), (17, 1261234), (26, 824653), (34, 630617), (179, 119782), (221, 97018), (271, 79118), (358, 59891), (442, 48509), (542, 39559), (2327, 9214), (3043, 7046), (3523, 6086), (4607, 4654)]