81157960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{1609}}^1$

素因数の和:1730

約数の個数: 64

約数和(自身を含む): 198802800

約数和(自身を除く): 117644840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 97, 104, 130, 194, 260, 388, 485, 520, 776, 970, 1261, 1609, 1940, 2522, 3218, 3880, 5044, 6305, 6436, 8045, 10088, 12610, 12872, 16090, 20917, 25220, 32180, 41834, 50440, 64360, 83668, 104585, 156073, 167336, 209170, 312146, 418340, 624292, 780365, 836680, 1248584, 1560730, 2028949, 3121460, 4057898, 6242920, 8115796, 10144745, 16231592, 20289490, 40578980, 81157960]

約数ペア:

[(1, 81157960), (2, 40578980), (4, 20289490), (5, 16231592), (8, 10144745), (10, 8115796), (13, 6242920), (20, 4057898), (26, 3121460), (40, 2028949), (52, 1560730), (65, 1248584), (97, 836680), (104, 780365), (130, 624292), (194, 418340), (260, 312146), (388, 209170), (485, 167336), (520, 156073), (776, 104585), (970, 83668), (1261, 64360), (1609, 50440), (1940, 41834), (2522, 32180), (3218, 25220), (3880, 20917), (5044, 16090), (6305, 12872), (6436, 12610), (8045, 10088)]