18409520

素因数分解:

$2^4\times 5^1\times {\mathrm{359}}^1\times {\mathrm{641}}^1$

素因数の和:1013

約数の個数: 40

約数和(自身を含む): 42988320

約数和(自身を除く): 24578800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 359, 641, 718, 1282, 1436, 1795, 2564, 2872, 3205, 3590, 5128, 5744, 6410, 7180, 10256, 12820, 14360, 25640, 28720, 51280, 230119, 460238, 920476, 1150595, 1840952, 2301190, 3681904, 4602380, 9204760, 18409520]

約数ペア:

[(1, 18409520), (2, 9204760), (4, 4602380), (5, 3681904), (8, 2301190), (10, 1840952), (16, 1150595), (20, 920476), (40, 460238), (80, 230119), (359, 51280), (641, 28720), (718, 25640), (1282, 14360), (1436, 12820), (1795, 10256), (2564, 7180), (2872, 6410), (3205, 5744), (3590, 5128)]