408940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 1032192

約数和(自身を除く): 623252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 127, 140, 161, 230, 254, 322, 460, 508, 635, 644, 805, 889, 1270, 1610, 1778, 2540, 2921, 3220, 3556, 4445, 5842, 8890, 11684, 14605, 17780, 20447, 29210, 40894, 58420, 81788, 102235, 204470, 408940]

約数ペア:

[(1, 408940), (2, 204470), (4, 102235), (5, 81788), (7, 58420), (10, 40894), (14, 29210), (20, 20447), (23, 17780), (28, 14605), (35, 11684), (46, 8890), (70, 5842), (92, 4445), (115, 3556), (127, 3220), (140, 2921), (161, 2540), (230, 1778), (254, 1610), (322, 1270), (460, 889), (508, 805), (635, 644)]