18018860

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:746

約数の個数: 48

約数和(自身を含む): 40037760

約数和(自身を除く): 22018900

約数列:

[1, 2, 4, 5, 10, 20, 29, 47, 58, 94, 116, 145, 188, 235, 290, 470, 580, 661, 940, 1322, 1363, 2644, 2726, 3305, 5452, 6610, 6815, 13220, 13630, 19169, 27260, 31067, 38338, 62134, 76676, 95845, 124268, 155335, 191690, 310670, 383380, 621340, 900943, 1801886, 3603772, 4504715, 9009430, 18018860]

約数ペア:

[(1, 18018860), (2, 9009430), (4, 4504715), (5, 3603772), (10, 1801886), (20, 900943), (29, 621340), (47, 383380), (58, 310670), (94, 191690), (116, 155335), (145, 124268), (188, 95845), (235, 76676), (290, 62134), (470, 38338), (580, 31067), (661, 27260), (940, 19169), (1322, 13630), (1363, 13220), (2644, 6815), (2726, 6610), (3305, 5452)]