21475870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{73}}^2$

素因数の和:197

約数の個数: 48

約数和(自身を含む): 43569792

約数和(自身を除く): 22093922

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 73, 130, 146, 155, 310, 365, 403, 730, 806, 949, 1898, 2015, 2263, 4030, 4526, 4745, 5329, 9490, 10658, 11315, 22630, 26645, 29419, 53290, 58838, 69277, 138554, 147095, 165199, 294190, 330398, 346385, 692770, 825995, 1651990, 2147587, 4295174, 10737935, 21475870]

約数ペア:

[(1, 21475870), (2, 10737935), (5, 4295174), (10, 2147587), (13, 1651990), (26, 825995), (31, 692770), (62, 346385), (65, 330398), (73, 294190), (130, 165199), (146, 147095), (155, 138554), (310, 69277), (365, 58838), (403, 53290), (730, 29419), (806, 26645), (949, 22630), (1898, 11315), (2015, 10658), (2263, 9490), (4030, 5329), (4526, 4745)]