51869240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{491}}^1$

素因数の和:660

約数の個数: 64

約数和(自身を含む): 123984000

約数和(自身を除く): 72114760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 139, 152, 190, 278, 380, 491, 556, 695, 760, 982, 1112, 1390, 1964, 2455, 2641, 2780, 3928, 4910, 5282, 5560, 9329, 9820, 10564, 13205, 18658, 19640, 21128, 26410, 37316, 46645, 52820, 68249, 74632, 93290, 105640, 136498, 186580, 272996, 341245, 373160, 545992, 682490, 1296731, 1364980, 2593462, 2729960, 5186924, 6483655, 10373848, 12967310, 25934620, 51869240]

約数ペア:

[(1, 51869240), (2, 25934620), (4, 12967310), (5, 10373848), (8, 6483655), (10, 5186924), (19, 2729960), (20, 2593462), (38, 1364980), (40, 1296731), (76, 682490), (95, 545992), (139, 373160), (152, 341245), (190, 272996), (278, 186580), (380, 136498), (491, 105640), (556, 93290), (695, 74632), (760, 68249), (982, 52820), (1112, 46645), (1390, 37316), (1964, 26410), (2455, 21128), (2641, 19640), (2780, 18658), (3928, 13205), (4910, 10564), (5282, 9820), (5560, 9329)]