21403620

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16987}}^1$

素因数の和:17009

約数の個数: 72

約数和(自身を含む): 74203584

約数和(自身を除く): 52799964

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16987, 33974, 50961, 67948, 84935, 101922, 118909, 152883, 169870, 203844, 237818, 254805, 305766, 339740, 356727, 475636, 509610, 594545, 611532, 713454, 764415, 1019220, 1070181, 1189090, 1426908, 1528830, 1783635, 2140362, 2378180, 3057660, 3567270, 4280724, 5350905, 7134540, 10701810, 21403620]

約数ペア:

[(1, 21403620), (2, 10701810), (3, 7134540), (4, 5350905), (5, 4280724), (6, 3567270), (7, 3057660), (9, 2378180), (10, 2140362), (12, 1783635), (14, 1528830), (15, 1426908), (18, 1189090), (20, 1070181), (21, 1019220), (28, 764415), (30, 713454), (35, 611532), (36, 594545), (42, 509610), (45, 475636), (60, 356727), (63, 339740), (70, 305766), (84, 254805), (90, 237818), (105, 203844), (126, 169870), (140, 152883), (180, 118909), (210, 101922), (252, 84935), (315, 67948), (420, 50961), (630, 33974), (1260, 16987)]