20268560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19489}}^1$

素因数の和:19515

約数の個数: 40

約数和(自身を含む): 50751960

約数和(自身を除く): 30483400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19489, 38978, 77956, 97445, 155912, 194890, 253357, 311824, 389780, 506714, 779560, 1013428, 1266785, 1559120, 2026856, 2533570, 4053712, 5067140, 10134280, 20268560]

約数ペア:

[(1, 20268560), (2, 10134280), (4, 5067140), (5, 4053712), (8, 2533570), (10, 2026856), (13, 1559120), (16, 1266785), (20, 1013428), (26, 779560), (40, 506714), (52, 389780), (65, 311824), (80, 253357), (104, 194890), (130, 155912), (208, 97445), (260, 77956), (520, 38978), (1040, 19489)]