21670480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:404

約数の個数: 80

約数和(自身を含む): 55246464

約数和(自身を除く): 33575984

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 67, 80, 104, 130, 134, 208, 260, 268, 311, 335, 520, 536, 622, 670, 871, 1040, 1072, 1244, 1340, 1555, 1742, 2488, 2680, 3110, 3484, 4043, 4355, 4976, 5360, 6220, 6968, 8086, 8710, 12440, 13936, 16172, 17420, 20215, 20837, 24880, 32344, 34840, 40430, 41674, 64688, 69680, 80860, 83348, 104185, 161720, 166696, 208370, 270881, 323440, 333392, 416740, 541762, 833480, 1083524, 1354405, 1666960, 2167048, 2708810, 4334096, 5417620, 10835240, 21670480]

約数ペア:

[(1, 21670480), (2, 10835240), (4, 5417620), (5, 4334096), (8, 2708810), (10, 2167048), (13, 1666960), (16, 1354405), (20, 1083524), (26, 833480), (40, 541762), (52, 416740), (65, 333392), (67, 323440), (80, 270881), (104, 208370), (130, 166696), (134, 161720), (208, 104185), (260, 83348), (268, 80860), (311, 69680), (335, 64688), (520, 41674), (536, 40430), (622, 34840), (670, 32344), (871, 24880), (1040, 20837), (1072, 20215), (1244, 17420), (1340, 16172), (1555, 13936), (1742, 12440), (2488, 8710), (2680, 8086), (3110, 6968), (3484, 6220), (4043, 5360), (4355, 4976)]