31780120

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:292

約数の個数: 64

約数和(自身を含む): 73872000

約数和(自身を除く): 42091880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 89, 113, 158, 178, 226, 316, 356, 395, 445, 452, 565, 632, 712, 790, 890, 904, 1130, 1580, 1780, 2260, 3160, 3560, 4520, 7031, 8927, 10057, 14062, 17854, 20114, 28124, 35155, 35708, 40228, 44635, 50285, 56248, 70310, 71416, 80456, 89270, 100570, 140620, 178540, 201140, 281240, 357080, 402280, 794503, 1589006, 3178012, 3972515, 6356024, 7945030, 15890060, 31780120]

約数ペア:

[(1, 31780120), (2, 15890060), (4, 7945030), (5, 6356024), (8, 3972515), (10, 3178012), (20, 1589006), (40, 794503), (79, 402280), (89, 357080), (113, 281240), (158, 201140), (178, 178540), (226, 140620), (316, 100570), (356, 89270), (395, 80456), (445, 71416), (452, 70310), (565, 56248), (632, 50285), (712, 44635), (790, 40228), (890, 35708), (904, 35155), (1130, 28124), (1580, 20114), (1780, 17854), (2260, 14062), (3160, 10057), (3560, 8927), (4520, 7031)]