18997228

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 36923040

約数和(自身を除く): 17925812

約数列:

[1, 2, 4, 17, 34, 43, 68, 73, 86, 89, 146, 172, 178, 292, 356, 731, 1241, 1462, 1513, 2482, 2924, 3026, 3139, 3827, 4964, 6052, 6278, 6497, 7654, 12556, 12994, 15308, 25988, 53363, 65059, 106726, 110449, 130118, 213452, 220898, 260236, 279371, 441796, 558742, 1117484, 4749307, 9498614, 18997228]

約数ペア:

[(1, 18997228), (2, 9498614), (4, 4749307), (17, 1117484), (34, 558742), (43, 441796), (68, 279371), (73, 260236), (86, 220898), (89, 213452), (146, 130118), (172, 110449), (178, 106726), (292, 65059), (356, 53363), (731, 25988), (1241, 15308), (1462, 12994), (1513, 12556), (2482, 7654), (2924, 6497), (3026, 6278), (3139, 6052), (3827, 4964)]