81420680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{877}}^1$

素因数の和:1110

約数の個数: 64

約数和(自身を含む): 201026880

約数和(自身を除く): 119606200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 211, 220, 422, 440, 844, 877, 1055, 1688, 1754, 2110, 2321, 3508, 4220, 4385, 4642, 7016, 8440, 8770, 9284, 9647, 11605, 17540, 18568, 19294, 23210, 35080, 38588, 46420, 48235, 77176, 92840, 96470, 185047, 192940, 370094, 385880, 740188, 925235, 1480376, 1850470, 2035517, 3700940, 4071034, 7401880, 8142068, 10177585, 16284136, 20355170, 40710340, 81420680]

約数ペア:

[(1, 81420680), (2, 40710340), (4, 20355170), (5, 16284136), (8, 10177585), (10, 8142068), (11, 7401880), (20, 4071034), (22, 3700940), (40, 2035517), (44, 1850470), (55, 1480376), (88, 925235), (110, 740188), (211, 385880), (220, 370094), (422, 192940), (440, 185047), (844, 96470), (877, 92840), (1055, 77176), (1688, 48235), (1754, 46420), (2110, 38588), (2321, 35080), (3508, 23210), (4220, 19294), (4385, 18568), (4642, 17540), (7016, 11605), (8440, 9647), (8770, 9284)]