21879680

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2011}}^1$

素因数の和:2047

約数の個数: 64

約数和(自身を含む): 55410480

約数和(自身を除く): 33530800

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 2011, 2176, 2720, 4022, 5440, 8044, 10055, 10880, 16088, 20110, 32176, 34187, 40220, 64352, 68374, 80440, 128704, 136748, 160880, 170935, 257408, 273496, 321760, 341870, 546992, 643520, 683740, 1093984, 1287040, 1367480, 2187968, 2734960, 4375936, 5469920, 10939840, 21879680]

約数ペア:

[(1, 21879680), (2, 10939840), (4, 5469920), (5, 4375936), (8, 2734960), (10, 2187968), (16, 1367480), (17, 1287040), (20, 1093984), (32, 683740), (34, 643520), (40, 546992), (64, 341870), (68, 321760), (80, 273496), (85, 257408), (128, 170935), (136, 160880), (160, 136748), (170, 128704), (272, 80440), (320, 68374), (340, 64352), (544, 40220), (640, 34187), (680, 32176), (1088, 20110), (1360, 16088), (2011, 10880), (2176, 10055), (2720, 8044), (4022, 5440)]