21879520

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{157}}^1$

素因数の和:252

約数の個数: 96

約数和(自身を含む): 56857248

約数和(自身を除く): 34977728

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 67, 80, 104, 130, 134, 157, 160, 208, 260, 268, 314, 335, 416, 520, 536, 628, 670, 785, 871, 1040, 1072, 1256, 1340, 1570, 1742, 2041, 2080, 2144, 2512, 2680, 3140, 3484, 4082, 4355, 5024, 5360, 6280, 6968, 8164, 8710, 10205, 10519, 10720, 12560, 13936, 16328, 17420, 20410, 21038, 25120, 27872, 32656, 34840, 40820, 42076, 52595, 65312, 69680, 81640, 84152, 105190, 136747, 139360, 163280, 168304, 210380, 273494, 326560, 336608, 420760, 546988, 683735, 841520, 1093976, 1367470, 1683040, 2187952, 2734940, 4375904, 5469880, 10939760, 21879520]

約数ペア:

[(1, 21879520), (2, 10939760), (4, 5469880), (5, 4375904), (8, 2734940), (10, 2187952), (13, 1683040), (16, 1367470), (20, 1093976), (26, 841520), (32, 683735), (40, 546988), (52, 420760), (65, 336608), (67, 326560), (80, 273494), (104, 210380), (130, 168304), (134, 163280), (157, 139360), (160, 136747), (208, 105190), (260, 84152), (268, 81640), (314, 69680), (335, 65312), (416, 52595), (520, 42076), (536, 40820), (628, 34840), (670, 32656), (785, 27872), (871, 25120), (1040, 21038), (1072, 20410), (1256, 17420), (1340, 16328), (1570, 13936), (1742, 12560), (2041, 10720), (2080, 10519), (2144, 10205), (2512, 8710), (2680, 8164), (3140, 6968), (3484, 6280), (4082, 5360), (4355, 5024)]