20264685

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{349}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 38304000

約数和(自身を除く): 18039315

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 79, 105, 147, 237, 245, 349, 395, 553, 735, 1047, 1185, 1659, 1745, 2443, 2765, 3871, 5235, 7329, 8295, 11613, 12215, 17101, 19355, 27571, 36645, 51303, 58065, 82713, 85505, 137855, 192997, 256515, 413565, 578991, 964985, 1350979, 2894955, 4052937, 6754895, 20264685]

約数ペア:

[(1, 20264685), (3, 6754895), (5, 4052937), (7, 2894955), (15, 1350979), (21, 964985), (35, 578991), (49, 413565), (79, 256515), (105, 192997), (147, 137855), (237, 85505), (245, 82713), (349, 58065), (395, 51303), (553, 36645), (735, 27571), (1047, 19355), (1185, 17101), (1659, 12215), (1745, 11613), (2443, 8295), (2765, 7329), (3871, 5235)]