21885760

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{5261}}^1$

素因数の和:5291

約数の個数: 56

約数和(自身を含む): 56135016

約数和(自身を除く): 34249256

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 5261, 10522, 21044, 26305, 42088, 52610, 68393, 84176, 105220, 136786, 168352, 210440, 273572, 336704, 341965, 420880, 547144, 683930, 841760, 1094288, 1367860, 1683520, 2188576, 2735720, 4377152, 5471440, 10942880, 21885760]

約数ペア:

[(1, 21885760), (2, 10942880), (4, 5471440), (5, 4377152), (8, 2735720), (10, 2188576), (13, 1683520), (16, 1367860), (20, 1094288), (26, 841760), (32, 683930), (40, 547144), (52, 420880), (64, 341965), (65, 336704), (80, 273572), (104, 210440), (130, 168352), (160, 136786), (208, 105220), (260, 84176), (320, 68393), (416, 52610), (520, 42088), (832, 26305), (1040, 21044), (2080, 10522), (4160, 5261)]