18910840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{887}}^1$

素因数の和:952

約数の個数: 64

約数和(自身を含む): 46992960

約数和(自身を除く): 28082120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 887, 1066, 1640, 1774, 2132, 2665, 3548, 4264, 4435, 5330, 7096, 8870, 10660, 11531, 17740, 21320, 23062, 35480, 36367, 46124, 57655, 72734, 92248, 115310, 145468, 181835, 230620, 290936, 363670, 461240, 472771, 727340, 945542, 1454680, 1891084, 2363855, 3782168, 4727710, 9455420, 18910840]

約数ペア:

[(1, 18910840), (2, 9455420), (4, 4727710), (5, 3782168), (8, 2363855), (10, 1891084), (13, 1454680), (20, 945542), (26, 727340), (40, 472771), (41, 461240), (52, 363670), (65, 290936), (82, 230620), (104, 181835), (130, 145468), (164, 115310), (205, 92248), (260, 72734), (328, 57655), (410, 46124), (520, 36367), (533, 35480), (820, 23062), (887, 21320), (1066, 17740), (1640, 11531), (1774, 10660), (2132, 8870), (2665, 7096), (3548, 5330), (4264, 4435)]