21089775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{139}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 42636160

約数和(自身を除く): 21546385

約数列:

[1, 3, 5, 7, 15, 17, 21, 25, 35, 51, 75, 85, 105, 119, 139, 175, 255, 289, 357, 417, 425, 525, 595, 695, 867, 973, 1275, 1445, 1785, 2023, 2085, 2363, 2919, 2975, 3475, 4335, 4865, 6069, 7089, 7225, 8925, 10115, 10425, 11815, 14595, 16541, 21675, 24325, 30345, 35445, 40171, 49623, 50575, 59075, 72975, 82705, 120513, 151725, 177225, 200855, 248115, 281197, 413525, 602565, 843591, 1004275, 1240575, 1405985, 3012825, 4217955, 7029925, 21089775]

約数ペア:

[(1, 21089775), (3, 7029925), (5, 4217955), (7, 3012825), (15, 1405985), (17, 1240575), (21, 1004275), (25, 843591), (35, 602565), (51, 413525), (75, 281197), (85, 248115), (105, 200855), (119, 177225), (139, 151725), (175, 120513), (255, 82705), (289, 72975), (357, 59075), (417, 50575), (425, 49623), (525, 40171), (595, 35445), (695, 30345), (867, 24325), (973, 21675), (1275, 16541), (1445, 14595), (1785, 11815), (2023, 10425), (2085, 10115), (2363, 8925), (2919, 7225), (2975, 7089), (3475, 6069), (4335, 4865)]