19851080

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{157}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 46926000

約数和(自身を除く): 27074920

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 109, 116, 145, 157, 218, 232, 290, 314, 436, 545, 580, 628, 785, 872, 1090, 1160, 1256, 1570, 2180, 3140, 3161, 4360, 4553, 6280, 6322, 9106, 12644, 15805, 17113, 18212, 22765, 25288, 31610, 34226, 36424, 45530, 63220, 68452, 85565, 91060, 126440, 136904, 171130, 182120, 342260, 496277, 684520, 992554, 1985108, 2481385, 3970216, 4962770, 9925540, 19851080]

約数ペア:

[(1, 19851080), (2, 9925540), (4, 4962770), (5, 3970216), (8, 2481385), (10, 1985108), (20, 992554), (29, 684520), (40, 496277), (58, 342260), (109, 182120), (116, 171130), (145, 136904), (157, 126440), (218, 91060), (232, 85565), (290, 68452), (314, 63220), (436, 45530), (545, 36424), (580, 34226), (628, 31610), (785, 25288), (872, 22765), (1090, 18212), (1160, 17113), (1256, 15805), (1570, 12644), (2180, 9106), (3140, 6322), (3161, 6280), (4360, 4553)]