18935984

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:369

約数の個数: 40

約数和(自身を含む): 37854720

約数和(自身を除く): 18918736

約数列:

[1, 2, 4, 8, 16, 71, 79, 142, 158, 211, 284, 316, 422, 568, 632, 844, 1136, 1264, 1688, 3376, 5609, 11218, 14981, 16669, 22436, 29962, 33338, 44872, 59924, 66676, 89744, 119848, 133352, 239696, 266704, 1183499, 2366998, 4733996, 9467992, 18935984]

約数ペア:

[(1, 18935984), (2, 9467992), (4, 4733996), (8, 2366998), (16, 1183499), (71, 266704), (79, 239696), (142, 133352), (158, 119848), (211, 89744), (284, 66676), (316, 59924), (422, 44872), (568, 33338), (632, 29962), (844, 22436), (1136, 16669), (1264, 14981), (1688, 11218), (3376, 5609)]