19868420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{6947}}^1$

素因数の和:6980

約数の個数: 48

約数和(自身を含む): 49025088

約数和(自身を除く): 29156668

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, 6947, 13894, 27788, 34735, 69470, 76417, 90311, 138940, 152834, 180622, 305668, 361244, 382085, 451555, 764170, 903110, 993421, 1528340, 1806220, 1986842, 3973684, 4967105, 9934210, 19868420]

約数ペア:

[(1, 19868420), (2, 9934210), (4, 4967105), (5, 3973684), (10, 1986842), (11, 1806220), (13, 1528340), (20, 993421), (22, 903110), (26, 764170), (44, 451555), (52, 382085), (55, 361244), (65, 305668), (110, 180622), (130, 152834), (143, 138940), (220, 90311), (260, 76417), (286, 69470), (572, 34735), (715, 27788), (1430, 13894), (2860, 6947)]