81513520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{439}}^1$

素因数の和:674

約数の個数: 80

約数和(自身を含む): 208200960

約数和(自身を除く): 126687440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 211, 220, 422, 439, 440, 844, 878, 880, 1055, 1688, 1756, 2110, 2195, 2321, 3376, 3512, 4220, 4390, 4642, 4829, 7024, 8440, 8780, 9284, 9658, 11605, 16880, 17560, 18568, 19316, 23210, 24145, 35120, 37136, 38632, 46420, 48290, 77264, 92629, 92840, 96580, 185258, 185680, 193160, 370516, 386320, 463145, 741032, 926290, 1018919, 1482064, 1852580, 2037838, 3705160, 4075676, 5094595, 7410320, 8151352, 10189190, 16302704, 20378380, 40756760, 81513520]

約数ペア:

[(1, 81513520), (2, 40756760), (4, 20378380), (5, 16302704), (8, 10189190), (10, 8151352), (11, 7410320), (16, 5094595), (20, 4075676), (22, 3705160), (40, 2037838), (44, 1852580), (55, 1482064), (80, 1018919), (88, 926290), (110, 741032), (176, 463145), (211, 386320), (220, 370516), (422, 193160), (439, 185680), (440, 185258), (844, 96580), (878, 92840), (880, 92629), (1055, 77264), (1688, 48290), (1756, 46420), (2110, 38632), (2195, 37136), (2321, 35120), (3376, 24145), (3512, 23210), (4220, 19316), (4390, 18568), (4642, 17560), (4829, 16880), (7024, 11605), (8440, 9658), (8780, 9284)]