21494790

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{991}}^1$

素因数の和:1245

約数の個数: 48

約数和(自身を含む): 56174976

約数和(自身を除く): 34680186

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 241, 482, 723, 991, 1205, 1446, 1982, 2169, 2410, 2973, 3615, 4338, 4955, 5946, 7230, 8919, 9910, 10845, 14865, 17838, 21690, 29730, 44595, 89190, 238831, 477662, 716493, 1194155, 1432986, 2149479, 2388310, 3582465, 4298958, 7164930, 10747395, 21494790]

約数ペア:

[(1, 21494790), (2, 10747395), (3, 7164930), (5, 4298958), (6, 3582465), (9, 2388310), (10, 2149479), (15, 1432986), (18, 1194155), (30, 716493), (45, 477662), (90, 238831), (241, 89190), (482, 44595), (723, 29730), (991, 21690), (1205, 17838), (1446, 14865), (1982, 10845), (2169, 9910), (2410, 8919), (2973, 7230), (3615, 5946), (4338, 4955)]