129898400

素因数分解:

$2^5\times 5^2\times {\mathrm{397}}^1\times {\mathrm{409}}^1$

素因数の和:826

約数の個数: 72

約数和(自身を含む): 318690540

約数和(自身を除く): 188792140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 397, 400, 409, 794, 800, 818, 1588, 1636, 1985, 2045, 3176, 3272, 3970, 4090, 6352, 6544, 7940, 8180, 9925, 10225, 12704, 13088, 15880, 16360, 19850, 20450, 31760, 32720, 39700, 40900, 63520, 65440, 79400, 81800, 158800, 162373, 163600, 317600, 324746, 327200, 649492, 811865, 1298984, 1623730, 2597968, 3247460, 4059325, 5195936, 6494920, 8118650, 12989840, 16237300, 25979680, 32474600, 64949200, 129898400]

約数ペア:

[(1, 129898400), (2, 64949200), (4, 32474600), (5, 25979680), (8, 16237300), (10, 12989840), (16, 8118650), (20, 6494920), (25, 5195936), (32, 4059325), (40, 3247460), (50, 2597968), (80, 1623730), (100, 1298984), (160, 811865), (200, 649492), (397, 327200), (400, 324746), (409, 317600), (794, 163600), (800, 162373), (818, 158800), (1588, 81800), (1636, 79400), (1985, 65440), (2045, 63520), (3176, 40900), (3272, 39700), (3970, 32720), (4090, 31760), (6352, 20450), (6544, 19850), (7940, 16360), (8180, 15880), (9925, 13088), (10225, 12704)]