21425960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{467}}^1$

素因数の和:546

約数の個数: 64

約数和(自身を含む): 51217920

約数和(自身を除く): 29791960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 62, 74, 124, 148, 155, 185, 248, 296, 310, 370, 467, 620, 740, 934, 1147, 1240, 1480, 1868, 2294, 2335, 3736, 4588, 4670, 5735, 9176, 9340, 11470, 14477, 17279, 18680, 22940, 28954, 34558, 45880, 57908, 69116, 72385, 86395, 115816, 138232, 144770, 172790, 289540, 345580, 535649, 579080, 691160, 1071298, 2142596, 2678245, 4285192, 5356490, 10712980, 21425960]

約数ペア:

[(1, 21425960), (2, 10712980), (4, 5356490), (5, 4285192), (8, 2678245), (10, 2142596), (20, 1071298), (31, 691160), (37, 579080), (40, 535649), (62, 345580), (74, 289540), (124, 172790), (148, 144770), (155, 138232), (185, 115816), (248, 86395), (296, 72385), (310, 69116), (370, 57908), (467, 45880), (620, 34558), (740, 28954), (934, 22940), (1147, 18680), (1240, 17279), (1480, 14477), (1868, 11470), (2294, 9340), (2335, 9176), (3736, 5735), (4588, 4670)]