81245420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{131041}}^1$

素因数の和:131081

約数の個数: 24

約数和(自身を含む): 176120448

約数和(自身を除く): 94875028

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 131041, 262082, 524164, 655205, 1310410, 2620820, 4062271, 8124542, 16249084, 20311355, 40622710, 81245420]

約数ペア:

[(1, 81245420), (2, 40622710), (4, 20311355), (5, 16249084), (10, 8124542), (20, 4062271), (31, 2620820), (62, 1310410), (124, 655205), (155, 524164), (310, 262082), (620, 131041)]