20420055

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 37024416

約数和(自身を除く): 16604361

約数列:

[1, 3, 5, 9, 15, 43, 45, 61, 129, 173, 183, 215, 305, 387, 519, 549, 645, 865, 915, 1557, 1935, 2595, 2623, 2745, 7439, 7785, 7869, 10553, 13115, 22317, 23607, 31659, 37195, 39345, 52765, 66951, 94977, 111585, 118035, 158295, 334755, 453779, 474885, 1361337, 2268895, 4084011, 6806685, 20420055]

約数ペア:

[(1, 20420055), (3, 6806685), (5, 4084011), (9, 2268895), (15, 1361337), (43, 474885), (45, 453779), (61, 334755), (129, 158295), (173, 118035), (183, 111585), (215, 94977), (305, 66951), (387, 52765), (519, 39345), (549, 37195), (645, 31659), (865, 23607), (915, 22317), (1557, 13115), (1935, 10553), (2595, 7869), (2623, 7785), (2745, 7439)]