18000885

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1289}}^1$

素因数の和:1330

約数の個数: 48

約数和(自身を含む): 35294400

約数和(自身を除く): 17293515

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1289, 1995, 2793, 3867, 4655, 6445, 9023, 13965, 19335, 24491, 27069, 45115, 63161, 73473, 122455, 135345, 171437, 189483, 315805, 367365, 514311, 857185, 947415, 1200059, 2571555, 3600177, 6000295, 18000885]

約数ペア:

[(1, 18000885), (3, 6000295), (5, 3600177), (7, 2571555), (15, 1200059), (19, 947415), (21, 857185), (35, 514311), (49, 367365), (57, 315805), (95, 189483), (105, 171437), (133, 135345), (147, 122455), (245, 73473), (285, 63161), (399, 45115), (665, 27069), (735, 24491), (931, 19335), (1289, 13965), (1995, 9023), (2793, 6445), (3867, 4655)]