21835040

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{571}}^1$

素因数の和:825

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30056800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 571, 956, 1142, 1195, 1912, 2284, 2390, 2855, 3824, 4568, 4780, 5710, 7648, 9136, 9560, 11420, 18272, 19120, 22840, 38240, 45680, 91360, 136469, 272938, 545876, 682345, 1091752, 1364690, 2183504, 2729380, 4367008, 5458760, 10917520, 21835040]

約数ペア:

[(1, 21835040), (2, 10917520), (4, 5458760), (5, 4367008), (8, 2729380), (10, 2183504), (16, 1364690), (20, 1091752), (32, 682345), (40, 545876), (80, 272938), (160, 136469), (239, 91360), (478, 45680), (571, 38240), (956, 22840), (1142, 19120), (1195, 18272), (1912, 11420), (2284, 9560), (2390, 9136), (2855, 7648), (3824, 5710), (4568, 4780)]