21731155

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:259

約数の個数: 32

約数和(自身を含む): 29122560

約数和(自身を除く): 7391405

約数列:

[1, 5, 19, 31, 47, 95, 155, 157, 235, 589, 785, 893, 1457, 2945, 2983, 4465, 4867, 7285, 7379, 14915, 24335, 27683, 36895, 92473, 138415, 140201, 228749, 462365, 701005, 1143745, 4346231, 21731155]

約数ペア:

[(1, 21731155), (5, 4346231), (19, 1143745), (31, 701005), (47, 462365), (95, 228749), (155, 140201), (157, 138415), (235, 92473), (589, 36895), (785, 27683), (893, 24335), (1457, 14915), (2945, 7379), (2983, 7285), (4465, 4867)]