21000966520

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{757}}^1\times {\mathrm{1747}}^1$

素因数の和:2912

約数の個数: 64

約数和(自身を含む): 47460926880

約数和(自身を除く): 26459960360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 757, 794, 1514, 1588, 1747, 1985, 3028, 3176, 3494, 3785, 3970, 6056, 6988, 7570, 7940, 8735, 13976, 15140, 15880, 17470, 30280, 34940, 69880, 300529, 601058, 693559, 1202116, 1322479, 1387118, 1502645, 2404232, 2644958, 2774236, 3005290, 3467795, 5289916, 5548472, 6010580, 6612395, 6935590, 10579832, 12021160, 13224790, 13871180, 26449580, 27742360, 52899160, 525024163, 1050048326, 2100096652, 2625120815, 4200193304, 5250241630, 10500483260, 21000966520]

約数ペア:

[(1, 21000966520), (2, 10500483260), (4, 5250241630), (5, 4200193304), (8, 2625120815), (10, 2100096652), (20, 1050048326), (40, 525024163), (397, 52899160), (757, 27742360), (794, 26449580), (1514, 13871180), (1588, 13224790), (1747, 12021160), (1985, 10579832), (3028, 6935590), (3176, 6612395), (3494, 6010580), (3785, 5548472), (3970, 5289916), (6056, 3467795), (6988, 3005290), (7570, 2774236), (7940, 2644958), (8735, 2404232), (13976, 1502645), (15140, 1387118), (15880, 1322479), (17470, 1202116), (30280, 693559), (34940, 601058), (69880, 300529)]