20668880

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 50889600

約数和(自身を除く): 30220720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 59, 80, 116, 118, 145, 151, 232, 236, 290, 295, 302, 464, 472, 580, 590, 604, 755, 944, 1160, 1180, 1208, 1510, 1711, 2320, 2360, 2416, 3020, 3422, 4379, 4720, 6040, 6844, 8555, 8758, 8909, 12080, 13688, 17110, 17516, 17818, 21895, 27376, 34220, 35032, 35636, 43790, 44545, 68440, 70064, 71272, 87580, 89090, 136880, 142544, 175160, 178180, 258361, 350320, 356360, 516722, 712720, 1033444, 1291805, 2066888, 2583610, 4133776, 5167220, 10334440, 20668880]

約数ペア:

[(1, 20668880), (2, 10334440), (4, 5167220), (5, 4133776), (8, 2583610), (10, 2066888), (16, 1291805), (20, 1033444), (29, 712720), (40, 516722), (58, 356360), (59, 350320), (80, 258361), (116, 178180), (118, 175160), (145, 142544), (151, 136880), (232, 89090), (236, 87580), (290, 71272), (295, 70064), (302, 68440), (464, 44545), (472, 43790), (580, 35636), (590, 35032), (604, 34220), (755, 27376), (944, 21895), (1160, 17818), (1180, 17516), (1208, 17110), (1510, 13688), (1711, 12080), (2320, 8909), (2360, 8758), (2416, 8555), (3020, 6844), (3422, 6040), (4379, 4720)]