28400840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54617}}^1$

素因数の和:54641

約数の個数: 32

約数和(自身を含む): 68818680

約数和(自身を除く): 40417840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 54617, 109234, 218468, 273085, 436936, 546170, 710021, 1092340, 1420042, 2184680, 2840084, 3550105, 5680168, 7100210, 14200420, 28400840]

約数ペア:

[(1, 28400840), (2, 14200420), (4, 7100210), (5, 5680168), (8, 3550105), (10, 2840084), (13, 2184680), (20, 1420042), (26, 1092340), (40, 710021), (52, 546170), (65, 436936), (104, 273085), (130, 218468), (260, 109234), (520, 54617)]