20862387

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1213}}^1$

素因数の和:1249

約数の個数: 48

約数和(自身を含む): 38750880

約数和(自身を除く): 17888493

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1213, 1323, 1911, 2457, 3639, 5733, 8491, 10917, 15769, 17199, 25473, 32751, 47307, 59437, 76419, 110383, 141921, 178311, 229257, 331149, 425763, 534933, 772681, 993447, 1604799, 2318043, 2980341, 6954129, 20862387]

約数ペア:

[(1, 20862387), (3, 6954129), (7, 2980341), (9, 2318043), (13, 1604799), (21, 993447), (27, 772681), (39, 534933), (49, 425763), (63, 331149), (91, 229257), (117, 178311), (147, 141921), (189, 110383), (273, 76419), (351, 59437), (441, 47307), (637, 32751), (819, 25473), (1213, 17199), (1323, 15769), (1911, 10917), (2457, 8491), (3639, 5733)]