21631690

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{443}}^1$

素因数の和:726

約数の個数: 32

約数和(自身を含む): 41238720

約数和(自身を除く): 19607030

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 257, 443, 514, 886, 1285, 2215, 2570, 4430, 4883, 8417, 9766, 16834, 24415, 42085, 48830, 84170, 113851, 227702, 569255, 1138510, 2163169, 4326338, 10815845, 21631690]

約数ペア:

[(1, 21631690), (2, 10815845), (5, 4326338), (10, 2163169), (19, 1138510), (38, 569255), (95, 227702), (190, 113851), (257, 84170), (443, 48830), (514, 42085), (886, 24415), (1285, 16834), (2215, 9766), (2570, 8417), (4430, 4883)]