28957640

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:342

約数の個数: 64

約数和(自身を含む): 67772160

約数和(自身を除く): 38814520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 73, 94, 146, 188, 211, 235, 292, 365, 376, 422, 470, 584, 730, 844, 940, 1055, 1460, 1688, 1880, 2110, 2920, 3431, 4220, 6862, 8440, 9917, 13724, 15403, 17155, 19834, 27448, 30806, 34310, 39668, 49585, 61612, 68620, 77015, 79336, 99170, 123224, 137240, 154030, 198340, 308060, 396680, 616120, 723941, 1447882, 2895764, 3619705, 5791528, 7239410, 14478820, 28957640]

約数ペア:

[(1, 28957640), (2, 14478820), (4, 7239410), (5, 5791528), (8, 3619705), (10, 2895764), (20, 1447882), (40, 723941), (47, 616120), (73, 396680), (94, 308060), (146, 198340), (188, 154030), (211, 137240), (235, 123224), (292, 99170), (365, 79336), (376, 77015), (422, 68620), (470, 61612), (584, 49585), (730, 39668), (844, 34310), (940, 30806), (1055, 27448), (1460, 19834), (1688, 17155), (1880, 15403), (2110, 13724), (2920, 9917), (3431, 8440), (4220, 6862)]