18780867

素因数分解:

$3^2\times 7^2\times {\mathrm{37}}^1\times {\mathrm{1151}}^1$

素因数の和:1208

約数の個数: 36

約数和(自身を含む): 32438016

約数和(自身を除く): 13657149

約数列:

[1, 3, 7, 9, 21, 37, 49, 63, 111, 147, 259, 333, 441, 777, 1151, 1813, 2331, 3453, 5439, 8057, 10359, 16317, 24171, 42587, 56399, 72513, 127761, 169197, 298109, 383283, 507591, 894327, 2086763, 2682981, 6260289, 18780867]

約数ペア:

[(1, 18780867), (3, 6260289), (7, 2682981), (9, 2086763), (21, 894327), (37, 507591), (49, 383283), (63, 298109), (111, 169197), (147, 127761), (259, 72513), (333, 56399), (441, 42587), (777, 24171), (1151, 16317), (1813, 10359), (2331, 8057), (3453, 5439)]