19485740

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{223}}^1\times {\mathrm{257}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 43690752

約数和(自身を除く): 24205012

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 223, 257, 340, 446, 514, 892, 1028, 1115, 1285, 2230, 2570, 3791, 4369, 4460, 5140, 7582, 8738, 15164, 17476, 18955, 21845, 37910, 43690, 57311, 75820, 87380, 114622, 229244, 286555, 573110, 974287, 1146220, 1948574, 3897148, 4871435, 9742870, 19485740]

約数ペア:

[(1, 19485740), (2, 9742870), (4, 4871435), (5, 3897148), (10, 1948574), (17, 1146220), (20, 974287), (34, 573110), (68, 286555), (85, 229244), (170, 114622), (223, 87380), (257, 75820), (340, 57311), (446, 43690), (514, 37910), (892, 21845), (1028, 18955), (1115, 17476), (1285, 15164), (2230, 8738), (2570, 7582), (3791, 5140), (4369, 4460)]