21855180

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^2\times {\mathrm{197}}^1$

素因数の和:295

約数の個数: 72

約数和(自身を含む): 62968752

約数和(自身を除く): 41113572

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 86, 129, 172, 197, 215, 258, 394, 430, 516, 591, 645, 788, 860, 985, 1182, 1290, 1849, 1970, 2364, 2580, 2955, 3698, 3940, 5547, 5910, 7396, 8471, 9245, 11094, 11820, 16942, 18490, 22188, 25413, 27735, 33884, 36980, 42355, 50826, 55470, 84710, 101652, 110940, 127065, 169420, 254130, 364253, 508260, 728506, 1092759, 1457012, 1821265, 2185518, 3642530, 4371036, 5463795, 7285060, 10927590, 21855180]

約数ペア:

[(1, 21855180), (2, 10927590), (3, 7285060), (4, 5463795), (5, 4371036), (6, 3642530), (10, 2185518), (12, 1821265), (15, 1457012), (20, 1092759), (30, 728506), (43, 508260), (60, 364253), (86, 254130), (129, 169420), (172, 127065), (197, 110940), (215, 101652), (258, 84710), (394, 55470), (430, 50826), (516, 42355), (591, 36980), (645, 33884), (788, 27735), (860, 25413), (985, 22188), (1182, 18490), (1290, 16942), (1849, 11820), (1970, 11094), (2364, 9245), (2580, 8471), (2955, 7396), (3698, 5910), (3940, 5547)]