9986780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{641}}^1$

素因数の和:710

約数の個数: 48

約数和(自身を含む): 22649760

約数和(自身を除く): 12662980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 641, 779, 820, 1282, 1558, 2564, 3116, 3205, 3895, 6410, 7790, 12179, 12820, 15580, 24358, 26281, 48716, 52562, 60895, 105124, 121790, 131405, 243580, 262810, 499339, 525620, 998678, 1997356, 2496695, 4993390, 9986780]

約数ペア:

[(1, 9986780), (2, 4993390), (4, 2496695), (5, 1997356), (10, 998678), (19, 525620), (20, 499339), (38, 262810), (41, 243580), (76, 131405), (82, 121790), (95, 105124), (164, 60895), (190, 52562), (205, 48716), (380, 26281), (410, 24358), (641, 15580), (779, 12820), (820, 12179), (1282, 7790), (1558, 6410), (2564, 3895), (3116, 3205)]