21853520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{21013}}^1$

素因数の和:21039

約数の個数: 40

約数和(自身を含む): 54720456

約数和(自身を除く): 32866936

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 21013, 42026, 84052, 105065, 168104, 210130, 273169, 336208, 420260, 546338, 840520, 1092676, 1365845, 1681040, 2185352, 2731690, 4370704, 5463380, 10926760, 21853520]

約数ペア:

[(1, 21853520), (2, 10926760), (4, 5463380), (5, 4370704), (8, 2731690), (10, 2185352), (13, 1681040), (16, 1365845), (20, 1092676), (26, 840520), (40, 546338), (52, 420260), (65, 336208), (80, 273169), (104, 210130), (130, 168104), (208, 105065), (260, 84052), (520, 42026), (1040, 21013)]