18819090

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{991}}^1$

素因数の和:1215

約数の個数: 48

約数和(自身を含む): 49211136

約数和(自身を除く): 30392046

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 211, 422, 633, 991, 1055, 1266, 1899, 1982, 2110, 2973, 3165, 3798, 4955, 5946, 6330, 8919, 9495, 9910, 14865, 17838, 18990, 29730, 44595, 89190, 209101, 418202, 627303, 1045505, 1254606, 1881909, 2091010, 3136515, 3763818, 6273030, 9409545, 18819090]

約数ペア:

[(1, 18819090), (2, 9409545), (3, 6273030), (5, 3763818), (6, 3136515), (9, 2091010), (10, 1881909), (15, 1254606), (18, 1045505), (30, 627303), (45, 418202), (90, 209101), (211, 89190), (422, 44595), (633, 29730), (991, 18990), (1055, 17838), (1266, 14865), (1899, 9910), (1982, 9495), (2110, 8919), (2973, 6330), (3165, 5946), (3798, 4955)]