2178380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 4989600

約数和(自身を除く): 2811220

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 43, 68, 85, 86, 149, 170, 172, 215, 298, 340, 430, 596, 731, 745, 860, 1462, 1490, 2533, 2924, 2980, 3655, 5066, 6407, 7310, 10132, 12665, 12814, 14620, 25330, 25628, 32035, 50660, 64070, 108919, 128140, 217838, 435676, 544595, 1089190, 2178380]

約数ペア:

[(1, 2178380), (2, 1089190), (4, 544595), (5, 435676), (10, 217838), (17, 128140), (20, 108919), (34, 64070), (43, 50660), (68, 32035), (85, 25628), (86, 25330), (149, 14620), (170, 12814), (172, 12665), (215, 10132), (298, 7310), (340, 6407), (430, 5066), (596, 3655), (731, 2980), (745, 2924), (860, 2533), (1462, 1490)]