20497360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19709}}^1$

素因数の和:19735

約数の個数: 40

約数和(自身を含む): 51324840

約数和(自身を除く): 30827480

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19709, 39418, 78836, 98545, 157672, 197090, 256217, 315344, 394180, 512434, 788360, 1024868, 1281085, 1576720, 2049736, 2562170, 4099472, 5124340, 10248680, 20497360]

約数ペア:

[(1, 20497360), (2, 10248680), (4, 5124340), (5, 4099472), (8, 2562170), (10, 2049736), (13, 1576720), (16, 1281085), (20, 1024868), (26, 788360), (40, 512434), (52, 394180), (65, 315344), (80, 256217), (104, 197090), (130, 157672), (208, 98545), (260, 78836), (520, 39418), (1040, 19709)]