19853764

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 41610240

約数和(自身を除く): 21756476

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 89, 124, 178, 217, 257, 356, 434, 514, 623, 868, 1028, 1246, 1799, 2492, 2759, 3598, 5518, 7196, 7967, 11036, 15934, 19313, 22873, 31868, 38626, 45746, 55769, 77252, 91492, 111538, 160111, 223076, 320222, 640444, 709063, 1418126, 2836252, 4963441, 9926882, 19853764]

約数ペア:

[(1, 19853764), (2, 9926882), (4, 4963441), (7, 2836252), (14, 1418126), (28, 709063), (31, 640444), (62, 320222), (89, 223076), (124, 160111), (178, 111538), (217, 91492), (257, 77252), (356, 55769), (434, 45746), (514, 38626), (623, 31868), (868, 22873), (1028, 19313), (1246, 15934), (1799, 11036), (2492, 7967), (2759, 7196), (3598, 5518)]