21863920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21023}}^1$

素因数の和:21049

約数の個数: 40

約数和(自身を含む): 54746496

約数和(自身を除く): 32882576

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21023, 42046, 84092, 105115, 168184, 210230, 273299, 336368, 420460, 546598, 840920, 1093196, 1366495, 1681840, 2186392, 2732990, 4372784, 5465980, 10931960, 21863920]

約数ペア:

[(1, 21863920), (2, 10931960), (4, 5465980), (5, 4372784), (8, 2732990), (10, 2186392), (13, 1681840), (16, 1366495), (20, 1093196), (26, 840920), (40, 546598), (52, 420460), (65, 336368), (80, 273299), (104, 210230), (130, 168184), (208, 105115), (260, 84092), (520, 42046), (1040, 21023)]