277780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1$

素因数の和:88

約数の個数: 48

約数和(自身を含む): 665280

約数和(自身を除く): 387500

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 43, 68, 76, 85, 86, 95, 170, 172, 190, 215, 323, 340, 380, 430, 646, 731, 817, 860, 1292, 1462, 1615, 1634, 2924, 3230, 3268, 3655, 4085, 6460, 7310, 8170, 13889, 14620, 16340, 27778, 55556, 69445, 138890, 277780]

約数ペア:

[(1, 277780), (2, 138890), (4, 69445), (5, 55556), (10, 27778), (17, 16340), (19, 14620), (20, 13889), (34, 8170), (38, 7310), (43, 6460), (68, 4085), (76, 3655), (85, 3268), (86, 3230), (95, 2924), (170, 1634), (172, 1615), (190, 1462), (215, 1292), (323, 860), (340, 817), (380, 731), (430, 646)]