81556280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^2\times {\mathrm{71}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 204755040

約数和(自身を除く): 123198760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 47, 52, 65, 71, 94, 104, 130, 142, 188, 235, 260, 284, 355, 376, 470, 520, 568, 611, 710, 923, 940, 1222, 1420, 1846, 1880, 2209, 2444, 2840, 3055, 3337, 3692, 4418, 4615, 4888, 6110, 6674, 7384, 8836, 9230, 11045, 12220, 13348, 16685, 17672, 18460, 22090, 24440, 26696, 28717, 33370, 36920, 43381, 44180, 57434, 66740, 86762, 88360, 114868, 133480, 143585, 156839, 173524, 216905, 229736, 287170, 313678, 347048, 433810, 574340, 627356, 784195, 867620, 1148680, 1254712, 1568390, 1735240, 2038907, 3136780, 4077814, 6273560, 8155628, 10194535, 16311256, 20389070, 40778140, 81556280]

約数ペア:

[(1, 81556280), (2, 40778140), (4, 20389070), (5, 16311256), (8, 10194535), (10, 8155628), (13, 6273560), (20, 4077814), (26, 3136780), (40, 2038907), (47, 1735240), (52, 1568390), (65, 1254712), (71, 1148680), (94, 867620), (104, 784195), (130, 627356), (142, 574340), (188, 433810), (235, 347048), (260, 313678), (284, 287170), (355, 229736), (376, 216905), (470, 173524), (520, 156839), (568, 143585), (611, 133480), (710, 114868), (923, 88360), (940, 86762), (1222, 66740), (1420, 57434), (1846, 44180), (1880, 43381), (2209, 36920), (2444, 33370), (2840, 28717), (3055, 26696), (3337, 24440), (3692, 22090), (4418, 18460), (4615, 17672), (4888, 16685), (6110, 13348), (6674, 12220), (7384, 11045), (8836, 9230)]