12989840

素因数分解:

$2^4\times 5^1\times {\mathrm{397}}^1\times {\mathrm{409}}^1$

素因数の和:819

約数の個数: 40

約数和(自身を含む): 30351480

約数和(自身を除く): 17361640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 397, 409, 794, 818, 1588, 1636, 1985, 2045, 3176, 3272, 3970, 4090, 6352, 6544, 7940, 8180, 15880, 16360, 31760, 32720, 162373, 324746, 649492, 811865, 1298984, 1623730, 2597968, 3247460, 6494920, 12989840]

約数ペア:

[(1, 12989840), (2, 6494920), (4, 3247460), (5, 2597968), (8, 1623730), (10, 1298984), (16, 811865), (20, 649492), (40, 324746), (80, 162373), (397, 32720), (409, 31760), (794, 16360), (818, 15880), (1588, 8180), (1636, 7940), (1985, 6544), (2045, 6352), (3176, 4090), (3272, 3970)]