20627840

素因数分解:

$2^7\times 5^1\times {\mathrm{167}}^1\times {\mathrm{193}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 49865760

約数和(自身を除く): 29237920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 167, 193, 320, 334, 386, 640, 668, 772, 835, 965, 1336, 1544, 1670, 1930, 2672, 3088, 3340, 3860, 5344, 6176, 6680, 7720, 10688, 12352, 13360, 15440, 21376, 24704, 26720, 30880, 32231, 53440, 61760, 64462, 106880, 123520, 128924, 161155, 257848, 322310, 515696, 644620, 1031392, 1289240, 2062784, 2578480, 4125568, 5156960, 10313920, 20627840]

約数ペア:

[(1, 20627840), (2, 10313920), (4, 5156960), (5, 4125568), (8, 2578480), (10, 2062784), (16, 1289240), (20, 1031392), (32, 644620), (40, 515696), (64, 322310), (80, 257848), (128, 161155), (160, 128924), (167, 123520), (193, 106880), (320, 64462), (334, 61760), (386, 53440), (640, 32231), (668, 30880), (772, 26720), (835, 24704), (965, 21376), (1336, 15440), (1544, 13360), (1670, 12352), (1930, 10688), (2672, 7720), (3088, 6680), (3340, 6176), (3860, 5344)]