256567780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{1907}}^1$

素因数の和:1985

約数の個数: 72

約数和(自身を含む): 636600384

約数和(自身を除く): 380032604

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 961, 1085, 1907, 1922, 2170, 3814, 3844, 4340, 4805, 6727, 7628, 9535, 9610, 13349, 13454, 19070, 19220, 26698, 26908, 33635, 38140, 53396, 59117, 66745, 67270, 118234, 133490, 134540, 236468, 266980, 295585, 413819, 591170, 827638, 1182340, 1655276, 1832627, 2069095, 3665254, 4138190, 7330508, 8276380, 9163135, 12828389, 18326270, 25656778, 36652540, 51313556, 64141945, 128283890, 256567780]

約数ペア:

[(1, 256567780), (2, 128283890), (4, 64141945), (5, 51313556), (7, 36652540), (10, 25656778), (14, 18326270), (20, 12828389), (28, 9163135), (31, 8276380), (35, 7330508), (62, 4138190), (70, 3665254), (124, 2069095), (140, 1832627), (155, 1655276), (217, 1182340), (310, 827638), (434, 591170), (620, 413819), (868, 295585), (961, 266980), (1085, 236468), (1907, 134540), (1922, 133490), (2170, 118234), (3814, 67270), (3844, 66745), (4340, 59117), (4805, 53396), (6727, 38140), (7628, 33635), (9535, 26908), (9610, 26698), (13349, 19220), (13454, 19070)]