21469760

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{397}}^1$

素因数の和:440

約数の個数: 84

約数和(自身を含む): 55499508

約数和(自身を除く): 34029748

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 169, 208, 260, 320, 338, 397, 416, 520, 676, 794, 832, 845, 1040, 1352, 1588, 1690, 1985, 2080, 2704, 3176, 3380, 3970, 4160, 5161, 5408, 6352, 6760, 7940, 10322, 10816, 12704, 13520, 15880, 20644, 25408, 25805, 27040, 31760, 41288, 51610, 54080, 63520, 67093, 82576, 103220, 127040, 134186, 165152, 206440, 268372, 330304, 335465, 412880, 536744, 670930, 825760, 1073488, 1341860, 1651520, 2146976, 2683720, 4293952, 5367440, 10734880, 21469760]

約数ペア:

[(1, 21469760), (2, 10734880), (4, 5367440), (5, 4293952), (8, 2683720), (10, 2146976), (13, 1651520), (16, 1341860), (20, 1073488), (26, 825760), (32, 670930), (40, 536744), (52, 412880), (64, 335465), (65, 330304), (80, 268372), (104, 206440), (130, 165152), (160, 134186), (169, 127040), (208, 103220), (260, 82576), (320, 67093), (338, 63520), (397, 54080), (416, 51610), (520, 41288), (676, 31760), (794, 27040), (832, 25805), (845, 25408), (1040, 20644), (1352, 15880), (1588, 13520), (1690, 12704), (1985, 10816), (2080, 10322), (2704, 7940), (3176, 6760), (3380, 6352), (3970, 5408), (4160, 5161)]