21909680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21067}}^1$

素因数の和:21093

約数の個数: 40

約数和(自身を含む): 54861072

約数和(自身を除く): 32951392

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21067, 42134, 84268, 105335, 168536, 210670, 273871, 337072, 421340, 547742, 842680, 1095484, 1369355, 1685360, 2190968, 2738710, 4381936, 5477420, 10954840, 21909680]

約数ペア:

[(1, 21909680), (2, 10954840), (4, 5477420), (5, 4381936), (8, 2738710), (10, 2190968), (13, 1685360), (16, 1369355), (20, 1095484), (26, 842680), (40, 547742), (52, 421340), (65, 337072), (80, 273871), (104, 210670), (130, 168536), (208, 105335), (260, 84268), (520, 42134), (1040, 21067)]