18643638

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{479}}^1\times {\mathrm{499}}^1$

素因数の和:996

約数の個数: 32

約数和(自身を含む): 40320000

約数和(自身を除く): 21676362

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 479, 499, 958, 998, 1437, 1497, 2874, 2994, 6227, 6487, 12454, 12974, 18681, 19461, 37362, 38922, 239021, 478042, 717063, 1434126, 3107273, 6214546, 9321819, 18643638]

約数ペア:

[(1, 18643638), (2, 9321819), (3, 6214546), (6, 3107273), (13, 1434126), (26, 717063), (39, 478042), (78, 239021), (479, 38922), (499, 37362), (958, 19461), (998, 18681), (1437, 12974), (1497, 12454), (2874, 6487), (2994, 6227)]