20948080

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{211}}^1$

素因数の和:314

約数の個数: 80

約数和(自身を含む): 52523424

約数和(自身を除く): 31575344

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 73, 80, 85, 136, 146, 170, 211, 272, 292, 340, 365, 422, 584, 680, 730, 844, 1055, 1168, 1241, 1360, 1460, 1688, 2110, 2482, 2920, 3376, 3587, 4220, 4964, 5840, 6205, 7174, 8440, 9928, 12410, 14348, 15403, 16880, 17935, 19856, 24820, 28696, 30806, 35870, 49640, 57392, 61612, 71740, 77015, 99280, 123224, 143480, 154030, 246448, 261851, 286960, 308060, 523702, 616120, 1047404, 1232240, 1309255, 2094808, 2618510, 4189616, 5237020, 10474040, 20948080]

約数ペア:

[(1, 20948080), (2, 10474040), (4, 5237020), (5, 4189616), (8, 2618510), (10, 2094808), (16, 1309255), (17, 1232240), (20, 1047404), (34, 616120), (40, 523702), (68, 308060), (73, 286960), (80, 261851), (85, 246448), (136, 154030), (146, 143480), (170, 123224), (211, 99280), (272, 77015), (292, 71740), (340, 61612), (365, 57392), (422, 49640), (584, 35870), (680, 30806), (730, 28696), (844, 24820), (1055, 19856), (1168, 17935), (1241, 16880), (1360, 15403), (1460, 14348), (1688, 12410), (2110, 9928), (2482, 8440), (2920, 7174), (3376, 6205), (3587, 5840), (4220, 4964)]