17980820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6287}}^1$

素因数の和:6320

約数の個数: 48

約数和(自身を含む): 44368128

約数和(自身を除く): 26387308

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 6287, 12574, 25148, 31435, 62870, 69157, 81731, 125740, 138314, 163462, 276628, 326924, 345785, 408655, 691570, 817310, 899041, 1383140, 1634620, 1798082, 3596164, 4495205, 8990410, 17980820]

約数ペア:

[(1, 17980820), (2, 8990410), (4, 4495205), (5, 3596164), (10, 1798082), (11, 1634620), (13, 1383140), (20, 899041), (22, 817310), (26, 691570), (44, 408655), (52, 345785), (55, 326924), (65, 276628), (110, 163462), (130, 138314), (143, 125740), (220, 81731), (260, 69157), (286, 62870), (572, 31435), (715, 25148), (1430, 12574), (2860, 6287)]