21391160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{317}}^1$

素因数の和:576

約数の個数: 64

約数和(自身を含む): 55408320

約数和(自身を除く): 34017160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 241, 280, 317, 482, 634, 964, 1205, 1268, 1585, 1687, 1928, 2219, 2410, 2536, 3170, 3374, 4438, 4820, 6340, 6748, 8435, 8876, 9640, 11095, 12680, 13496, 16870, 17752, 22190, 33740, 44380, 67480, 76397, 88760, 152794, 305588, 381985, 534779, 611176, 763970, 1069558, 1527940, 2139116, 2673895, 3055880, 4278232, 5347790, 10695580, 21391160]

約数ペア:

[(1, 21391160), (2, 10695580), (4, 5347790), (5, 4278232), (7, 3055880), (8, 2673895), (10, 2139116), (14, 1527940), (20, 1069558), (28, 763970), (35, 611176), (40, 534779), (56, 381985), (70, 305588), (140, 152794), (241, 88760), (280, 76397), (317, 67480), (482, 44380), (634, 33740), (964, 22190), (1205, 17752), (1268, 16870), (1585, 13496), (1687, 12680), (1928, 11095), (2219, 9640), (2410, 8876), (2536, 8435), (3170, 6748), (3374, 6340), (4438, 4820)]