19913900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:303

約数の個数: 72

約数和(自身を含む): 46663680

約数和(自身を除く): 26749780

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 47, 50, 76, 94, 95, 100, 188, 190, 223, 235, 380, 446, 470, 475, 892, 893, 940, 950, 1115, 1175, 1786, 1900, 2230, 2350, 3572, 4237, 4460, 4465, 4700, 5575, 8474, 8930, 10481, 11150, 16948, 17860, 20962, 21185, 22300, 22325, 41924, 42370, 44650, 52405, 84740, 89300, 104810, 105925, 199139, 209620, 211850, 262025, 398278, 423700, 524050, 796556, 995695, 1048100, 1991390, 3982780, 4978475, 9956950, 19913900]

約数ペア:

[(1, 19913900), (2, 9956950), (4, 4978475), (5, 3982780), (10, 1991390), (19, 1048100), (20, 995695), (25, 796556), (38, 524050), (47, 423700), (50, 398278), (76, 262025), (94, 211850), (95, 209620), (100, 199139), (188, 105925), (190, 104810), (223, 89300), (235, 84740), (380, 52405), (446, 44650), (470, 42370), (475, 41924), (892, 22325), (893, 22300), (940, 21185), (950, 20962), (1115, 17860), (1175, 16948), (1786, 11150), (1900, 10481), (2230, 8930), (2350, 8474), (3572, 5575), (4237, 4700), (4460, 4465)]