19718920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2917}}^1$

素因数の和:2954

約数の個数: 48

約数和(自身を含む): 48059460

約数和(自身を除く): 28340540

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 1352, 1690, 2917, 3380, 5834, 6760, 11668, 14585, 23336, 29170, 37921, 58340, 75842, 116680, 151684, 189605, 303368, 379210, 492973, 758420, 985946, 1516840, 1971892, 2464865, 3943784, 4929730, 9859460, 19718920]

約数ペア:

[(1, 19718920), (2, 9859460), (4, 4929730), (5, 3943784), (8, 2464865), (10, 1971892), (13, 1516840), (20, 985946), (26, 758420), (40, 492973), (52, 379210), (65, 303368), (104, 189605), (130, 151684), (169, 116680), (260, 75842), (338, 58340), (520, 37921), (676, 29170), (845, 23336), (1352, 14585), (1690, 11668), (2917, 6760), (3380, 5834)]