21039920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23909}}^1$

素因数の和:23933

約数の個数: 40

約数和(自身を含む): 53367120

約数和(自身を除く): 32327200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 23909, 47818, 95636, 119545, 191272, 239090, 262999, 382544, 478180, 525998, 956360, 1051996, 1314995, 1912720, 2103992, 2629990, 4207984, 5259980, 10519960, 21039920]

約数ペア:

[(1, 21039920), (2, 10519960), (4, 5259980), (5, 4207984), (8, 2629990), (10, 2103992), (11, 1912720), (16, 1314995), (20, 1051996), (22, 956360), (40, 525998), (44, 478180), (55, 382544), (80, 262999), (88, 239090), (110, 191272), (176, 119545), (220, 95636), (440, 47818), (880, 23909)]