20865680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{181}}^1$

素因数の和:336

約数の個数: 80

約数和(自身を含む): 53621568

約数和(自身を除く): 32755888

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 131, 176, 181, 220, 262, 362, 440, 524, 655, 724, 880, 905, 1048, 1310, 1441, 1448, 1810, 1991, 2096, 2620, 2882, 2896, 3620, 3982, 5240, 5764, 7205, 7240, 7964, 9955, 10480, 11528, 14410, 14480, 15928, 19910, 23056, 23711, 28820, 31856, 39820, 47422, 57640, 79640, 94844, 115280, 118555, 159280, 189688, 237110, 260821, 379376, 474220, 521642, 948440, 1043284, 1304105, 1896880, 2086568, 2608210, 4173136, 5216420, 10432840, 20865680]

約数ペア:

[(1, 20865680), (2, 10432840), (4, 5216420), (5, 4173136), (8, 2608210), (10, 2086568), (11, 1896880), (16, 1304105), (20, 1043284), (22, 948440), (40, 521642), (44, 474220), (55, 379376), (80, 260821), (88, 237110), (110, 189688), (131, 159280), (176, 118555), (181, 115280), (220, 94844), (262, 79640), (362, 57640), (440, 47422), (524, 39820), (655, 31856), (724, 28820), (880, 23711), (905, 23056), (1048, 19910), (1310, 15928), (1441, 14480), (1448, 14410), (1810, 11528), (1991, 10480), (2096, 9955), (2620, 7964), (2882, 7240), (2896, 7205), (3620, 5764), (3982, 5240)]