20581288

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1663}}^1$

素因数の和:1706

約数の個数: 64

約数和(自身を含む): 50319360

約数和(自身を除く): 29738072

約数列:

[1, 2, 4, 7, 8, 13, 14, 17, 26, 28, 34, 52, 56, 68, 91, 104, 119, 136, 182, 221, 238, 364, 442, 476, 728, 884, 952, 1547, 1663, 1768, 3094, 3326, 6188, 6652, 11641, 12376, 13304, 21619, 23282, 28271, 43238, 46564, 56542, 86476, 93128, 113084, 151333, 172952, 197897, 226168, 302666, 367523, 395794, 605332, 735046, 791588, 1210664, 1470092, 1583176, 2572661, 2940184, 5145322, 10290644, 20581288]

約数ペア:

[(1, 20581288), (2, 10290644), (4, 5145322), (7, 2940184), (8, 2572661), (13, 1583176), (14, 1470092), (17, 1210664), (26, 791588), (28, 735046), (34, 605332), (52, 395794), (56, 367523), (68, 302666), (91, 226168), (104, 197897), (119, 172952), (136, 151333), (182, 113084), (221, 93128), (238, 86476), (364, 56542), (442, 46564), (476, 43238), (728, 28271), (884, 23282), (952, 21619), (1547, 13304), (1663, 12376), (1768, 11641), (3094, 6652), (3326, 6188)]