21195990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5477}}^1$

素因数の和:5533

約数の個数: 48

約数和(自身を含む): 56401488

約数和(自身を除く): 35205498

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 43, 45, 86, 90, 129, 215, 258, 387, 430, 645, 774, 1290, 1935, 3870, 5477, 10954, 16431, 27385, 32862, 49293, 54770, 82155, 98586, 164310, 235511, 246465, 471022, 492930, 706533, 1177555, 1413066, 2119599, 2355110, 3532665, 4239198, 7065330, 10597995, 21195990]

約数ペア:

[(1, 21195990), (2, 10597995), (3, 7065330), (5, 4239198), (6, 3532665), (9, 2355110), (10, 2119599), (15, 1413066), (18, 1177555), (30, 706533), (43, 492930), (45, 471022), (86, 246465), (90, 235511), (129, 164310), (215, 98586), (258, 82155), (387, 54770), (430, 49293), (645, 32862), (774, 27385), (1290, 16431), (1935, 10954), (3870, 5477)]