640941864

素因数分解:

$2^3\times 3^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1\times {\mathrm{4373}}^1$

素因数の和:4610

約数の個数: 64

約数和(自身を含む): 1662819840

約数和(自身を除く): 1021877976

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 31, 62, 93, 124, 186, 197, 248, 372, 394, 591, 744, 788, 1182, 1576, 2364, 4373, 4728, 6107, 8746, 12214, 13119, 17492, 18321, 24428, 26238, 34984, 36642, 48856, 52476, 73284, 104952, 135563, 146568, 271126, 406689, 542252, 813378, 861481, 1084504, 1626756, 1722962, 2584443, 3253512, 3445924, 5168886, 6891848, 10337772, 20675544, 26705911, 53411822, 80117733, 106823644, 160235466, 213647288, 320470932, 640941864]

約数ペア:

[(1, 640941864), (2, 320470932), (3, 213647288), (4, 160235466), (6, 106823644), (8, 80117733), (12, 53411822), (24, 26705911), (31, 20675544), (62, 10337772), (93, 6891848), (124, 5168886), (186, 3445924), (197, 3253512), (248, 2584443), (372, 1722962), (394, 1626756), (591, 1084504), (744, 861481), (788, 813378), (1182, 542252), (1576, 406689), (2364, 271126), (4373, 146568), (4728, 135563), (6107, 104952), (8746, 73284), (12214, 52476), (13119, 48856), (17492, 36642), (18321, 34984), (24428, 26238)]