28905080

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{521}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 69530400

約数和(自身を除く): 40625320

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 73, 76, 95, 146, 152, 190, 292, 365, 380, 521, 584, 730, 760, 1042, 1387, 1460, 2084, 2605, 2774, 2920, 4168, 5210, 5548, 6935, 9899, 10420, 11096, 13870, 19798, 20840, 27740, 38033, 39596, 49495, 55480, 76066, 79192, 98990, 152132, 190165, 197980, 304264, 380330, 395960, 722627, 760660, 1445254, 1521320, 2890508, 3613135, 5781016, 7226270, 14452540, 28905080]

約数ペア:

[(1, 28905080), (2, 14452540), (4, 7226270), (5, 5781016), (8, 3613135), (10, 2890508), (19, 1521320), (20, 1445254), (38, 760660), (40, 722627), (73, 395960), (76, 380330), (95, 304264), (146, 197980), (152, 190165), (190, 152132), (292, 98990), (365, 79192), (380, 76066), (521, 55480), (584, 49495), (730, 39596), (760, 38033), (1042, 27740), (1387, 20840), (1460, 19798), (2084, 13870), (2605, 11096), (2774, 10420), (2920, 9899), (4168, 6935), (5210, 5548)]