643916

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:114

約数の個数: 48

約数和(自身を含む): 1458240

約数和(自身を除く): 814324

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 29, 52, 58, 61, 91, 116, 122, 182, 203, 244, 364, 377, 406, 427, 754, 793, 812, 854, 1508, 1586, 1708, 1769, 2639, 3172, 3538, 5278, 5551, 7076, 10556, 11102, 12383, 22204, 22997, 24766, 45994, 49532, 91988, 160979, 321958, 643916]

約数ペア:

[(1, 643916), (2, 321958), (4, 160979), (7, 91988), (13, 49532), (14, 45994), (26, 24766), (28, 22997), (29, 22204), (52, 12383), (58, 11102), (61, 10556), (91, 7076), (116, 5551), (122, 5278), (182, 3538), (203, 3172), (244, 2639), (364, 1769), (377, 1708), (406, 1586), (427, 1508), (754, 854), (793, 812)]