155213440

素因数分解:

$2^7\times 5^1\times {\mathrm{242521}}^1$

素因数の和:242540

約数の個数: 32

約数和(自身を含む): 371058660

約数和(自身を除く): 215845220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 242521, 485042, 970084, 1212605, 1940168, 2425210, 3880336, 4850420, 7760672, 9700840, 15521344, 19401680, 31042688, 38803360, 77606720, 155213440]

約数ペア:

[(1, 155213440), (2, 77606720), (4, 38803360), (5, 31042688), (8, 19401680), (10, 15521344), (16, 9700840), (20, 7760672), (32, 4850420), (40, 3880336), (64, 2425210), (80, 1940168), (128, 1212605), (160, 970084), (320, 485042), (640, 242521)]