18678940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1321}}^1$

素因数の和:1438

約数の個数: 48

約数和(自身を含む): 45307584

約数和(自身を除く): 26628644

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1321, 1414, 2020, 2642, 2828, 3535, 5284, 6605, 7070, 9247, 13210, 14140, 18494, 26420, 36988, 46235, 92470, 133421, 184940, 266842, 533684, 667105, 933947, 1334210, 1867894, 2668420, 3735788, 4669735, 9339470, 18678940]

約数ペア:

[(1, 18678940), (2, 9339470), (4, 4669735), (5, 3735788), (7, 2668420), (10, 1867894), (14, 1334210), (20, 933947), (28, 667105), (35, 533684), (70, 266842), (101, 184940), (140, 133421), (202, 92470), (404, 46235), (505, 36988), (707, 26420), (1010, 18494), (1321, 14140), (1414, 13210), (2020, 9247), (2642, 7070), (2828, 6605), (3535, 5284)]