20990564

素因数分解:

$2^2\times 7^1\times {\mathrm{67}}^2\times {\mathrm{167}}^1$

素因数の和:312

約数の個数: 36

約数和(自身を含む): 42872256

約数和(自身を除く): 21881692

約数列:

[1, 2, 4, 7, 14, 28, 67, 134, 167, 268, 334, 469, 668, 938, 1169, 1876, 2338, 4489, 4676, 8978, 11189, 17956, 22378, 31423, 44756, 62846, 78323, 125692, 156646, 313292, 749663, 1499326, 2998652, 5247641, 10495282, 20990564]

約数ペア:

[(1, 20990564), (2, 10495282), (4, 5247641), (7, 2998652), (14, 1499326), (28, 749663), (67, 313292), (134, 156646), (167, 125692), (268, 78323), (334, 62846), (469, 44756), (668, 31423), (938, 22378), (1169, 17956), (1876, 11189), (2338, 8978), (4489, 4676)]