19782620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6917}}^1$

素因数の和:6950

約数の個数: 48

約数和(自身を含む): 48813408

約数和(自身を除く): 29030788

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, 6917, 13834, 27668, 34585, 69170, 76087, 89921, 138340, 152174, 179842, 304348, 359684, 380435, 449605, 760870, 899210, 989131, 1521740, 1798420, 1978262, 3956524, 4945655, 9891310, 19782620]

約数ペア:

[(1, 19782620), (2, 9891310), (4, 4945655), (5, 3956524), (10, 1978262), (11, 1798420), (13, 1521740), (20, 989131), (22, 899210), (26, 760870), (44, 449605), (52, 380435), (55, 359684), (65, 304348), (110, 179842), (130, 152174), (143, 138340), (220, 89921), (260, 76087), (286, 69170), (572, 34585), (715, 27668), (1430, 13834), (2860, 6917)]