21065355

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20353}}^1$

素因数の和:20387

約数の個数: 24

約数和(自身を含む): 38102688

約数和(自身を除く): 17037333

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20353, 61059, 101765, 183177, 305295, 468119, 915885, 1404357, 2340595, 4213071, 7021785, 21065355]

約数ペア:

[(1, 21065355), (3, 7021785), (5, 4213071), (9, 2340595), (15, 1404357), (23, 915885), (45, 468119), (69, 305295), (115, 183177), (207, 101765), (345, 61059), (1035, 20353)]