18656560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17939}}^1$

素因数の和:17965

約数の個数: 40

約数和(自身を含む): 46715760

約数和(自身を除く): 28059200

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 17939, 35878, 71756, 89695, 143512, 179390, 233207, 287024, 358780, 466414, 717560, 932828, 1166035, 1435120, 1865656, 2332070, 3731312, 4664140, 9328280, 18656560]

約数ペア:

[(1, 18656560), (2, 9328280), (4, 4664140), (5, 3731312), (8, 2332070), (10, 1865656), (13, 1435120), (16, 1166035), (20, 932828), (26, 717560), (40, 466414), (52, 358780), (65, 287024), (80, 233207), (104, 179390), (130, 143512), (208, 89695), (260, 71756), (520, 35878), (1040, 17939)]