21475890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{661}}^1$

素因数の和:712

約数の個数: 72

約数和(自身を含む): 59019948

約数和(自身を除く): 37544058

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 19, 30, 38, 45, 57, 90, 95, 114, 171, 190, 285, 342, 361, 570, 661, 722, 855, 1083, 1322, 1710, 1805, 1983, 2166, 3249, 3305, 3610, 3966, 5415, 5949, 6498, 6610, 9915, 10830, 11898, 12559, 16245, 19830, 25118, 29745, 32490, 37677, 59490, 62795, 75354, 113031, 125590, 188385, 226062, 238621, 376770, 477242, 565155, 715863, 1130310, 1193105, 1431726, 2147589, 2386210, 3579315, 4295178, 7158630, 10737945, 21475890]

約数ペア:

[(1, 21475890), (2, 10737945), (3, 7158630), (5, 4295178), (6, 3579315), (9, 2386210), (10, 2147589), (15, 1431726), (18, 1193105), (19, 1130310), (30, 715863), (38, 565155), (45, 477242), (57, 376770), (90, 238621), (95, 226062), (114, 188385), (171, 125590), (190, 113031), (285, 75354), (342, 62795), (361, 59490), (570, 37677), (661, 32490), (722, 29745), (855, 25118), (1083, 19830), (1322, 16245), (1710, 12559), (1805, 11898), (1983, 10830), (2166, 9915), (3249, 6610), (3305, 6498), (3610, 5949), (3966, 5415)]