20638140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{29}}^2\times {\mathrm{409}}^1$

素因数の和:479

約数の個数: 72

約数和(自身を含む): 59994480

約数和(自身を除く): 39356340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 29, 30, 58, 60, 87, 116, 145, 174, 290, 348, 409, 435, 580, 818, 841, 870, 1227, 1636, 1682, 1740, 2045, 2454, 2523, 3364, 4090, 4205, 4908, 5046, 6135, 8180, 8410, 10092, 11861, 12270, 12615, 16820, 23722, 24540, 25230, 35583, 47444, 50460, 59305, 71166, 118610, 142332, 177915, 237220, 343969, 355830, 687938, 711660, 1031907, 1375876, 1719845, 2063814, 3439690, 4127628, 5159535, 6879380, 10319070, 20638140]

約数ペア:

[(1, 20638140), (2, 10319070), (3, 6879380), (4, 5159535), (5, 4127628), (6, 3439690), (10, 2063814), (12, 1719845), (15, 1375876), (20, 1031907), (29, 711660), (30, 687938), (58, 355830), (60, 343969), (87, 237220), (116, 177915), (145, 142332), (174, 118610), (290, 71166), (348, 59305), (409, 50460), (435, 47444), (580, 35583), (818, 25230), (841, 24540), (870, 23722), (1227, 16820), (1636, 12615), (1682, 12270), (1740, 11861), (2045, 10092), (2454, 8410), (2523, 8180), (3364, 6135), (4090, 5046), (4205, 4908)]