218897721

素因数分解:

$3^4\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2459}}^1$

素因数の和:2635

約数の個数: 40

約数和(自身を含む): 376242240

約数和(自身を除く): 157344519

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 157, 189, 471, 567, 1099, 1413, 2459, 3297, 4239, 7377, 9891, 12717, 17213, 22131, 29673, 51639, 66393, 89019, 154917, 199179, 386063, 464751, 1158189, 1394253, 2702441, 3474567, 8107323, 10423701, 24321969, 31271103, 72965907, 218897721]

約数ペア:

[(1, 218897721), (3, 72965907), (7, 31271103), (9, 24321969), (21, 10423701), (27, 8107323), (63, 3474567), (81, 2702441), (157, 1394253), (189, 1158189), (471, 464751), (567, 386063), (1099, 199179), (1413, 154917), (2459, 89019), (3297, 66393), (4239, 51639), (7377, 29673), (9891, 22131), (12717, 17213)]