20458880

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2459}}^1$

素因数の和:2491

約数の個数: 64

約数和(自身を含む): 52693200

約数和(自身を除く): 32234320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2459, 4160, 4918, 8320, 9836, 12295, 19672, 24590, 31967, 39344, 49180, 63934, 78688, 98360, 127868, 157376, 159835, 196720, 255736, 314752, 319670, 393440, 511472, 639340, 786880, 1022944, 1278680, 1573760, 2045888, 2557360, 4091776, 5114720, 10229440, 20458880]

約数ペア:

[(1, 20458880), (2, 10229440), (4, 5114720), (5, 4091776), (8, 2557360), (10, 2045888), (13, 1573760), (16, 1278680), (20, 1022944), (26, 786880), (32, 639340), (40, 511472), (52, 393440), (64, 319670), (65, 314752), (80, 255736), (104, 196720), (128, 159835), (130, 157376), (160, 127868), (208, 98360), (260, 78688), (320, 63934), (416, 49180), (520, 39344), (640, 31967), (832, 24590), (1040, 19672), (1664, 12295), (2080, 9836), (2459, 8320), (4160, 4918)]