20916660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{23}}^2\times {\mathrm{659}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 61316640

約数和(自身を除く): 40399980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 46, 60, 69, 92, 115, 138, 230, 276, 345, 460, 529, 659, 690, 1058, 1318, 1380, 1587, 1977, 2116, 2636, 2645, 3174, 3295, 3954, 5290, 6348, 6590, 7908, 7935, 9885, 10580, 13180, 15157, 15870, 19770, 30314, 31740, 39540, 45471, 60628, 75785, 90942, 151570, 181884, 227355, 303140, 348611, 454710, 697222, 909420, 1045833, 1394444, 1743055, 2091666, 3486110, 4183332, 5229165, 6972220, 10458330, 20916660]

約数ペア:

[(1, 20916660), (2, 10458330), (3, 6972220), (4, 5229165), (5, 4183332), (6, 3486110), (10, 2091666), (12, 1743055), (15, 1394444), (20, 1045833), (23, 909420), (30, 697222), (46, 454710), (60, 348611), (69, 303140), (92, 227355), (115, 181884), (138, 151570), (230, 90942), (276, 75785), (345, 60628), (460, 45471), (529, 39540), (659, 31740), (690, 30314), (1058, 19770), (1318, 15870), (1380, 15157), (1587, 13180), (1977, 10580), (2116, 9885), (2636, 7935), (2645, 7908), (3174, 6590), (3295, 6348), (3954, 5290)]