20558644

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 19358156

約数列:

[1, 2, 4, 17, 34, 43, 68, 79, 86, 89, 158, 172, 178, 316, 356, 731, 1343, 1462, 1513, 2686, 2924, 3026, 3397, 3827, 5372, 6052, 6794, 7031, 7654, 13588, 14062, 15308, 28124, 57749, 65059, 115498, 119527, 130118, 230996, 239054, 260236, 302333, 478108, 604666, 1209332, 5139661, 10279322, 20558644]

約数ペア:

[(1, 20558644), (2, 10279322), (4, 5139661), (17, 1209332), (34, 604666), (43, 478108), (68, 302333), (79, 260236), (86, 239054), (89, 230996), (158, 130118), (172, 119527), (178, 115498), (316, 65059), (356, 57749), (731, 28124), (1343, 15308), (1462, 14062), (1513, 13588), (2686, 7654), (2924, 7031), (3026, 6794), (3397, 6052), (3827, 5372)]