21053912

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{419}}^1\times {\mathrm{571}}^1$

素因数の和:1007

約数の個数: 32

約数和(自身を含む): 43243200

約数和(自身を除く): 22189288

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 419, 571, 838, 1142, 1676, 2284, 3352, 4568, 4609, 6281, 9218, 12562, 18436, 25124, 36872, 50248, 239249, 478498, 956996, 1913992, 2631739, 5263478, 10526956, 21053912]

約数ペア:

[(1, 21053912), (2, 10526956), (4, 5263478), (8, 2631739), (11, 1913992), (22, 956996), (44, 478498), (88, 239249), (419, 50248), (571, 36872), (838, 25124), (1142, 18436), (1676, 12562), (2284, 9218), (3352, 6281), (4568, 4609)]