20649580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1109}}^1$

素因数の和:1151

約数の個数: 72

約数和(自身を含む): 53146800

約数和(自身を除く): 32497220

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1109, 1330, 1862, 2218, 2660, 3724, 4436, 4655, 5545, 7763, 9310, 11090, 15526, 18620, 21071, 22180, 31052, 38815, 42142, 54341, 77630, 84284, 105355, 108682, 147497, 155260, 210710, 217364, 271705, 294994, 421420, 543410, 589988, 737485, 1032479, 1086820, 1474970, 2064958, 2949940, 4129916, 5162395, 10324790, 20649580]

約数ペア:

[(1, 20649580), (2, 10324790), (4, 5162395), (5, 4129916), (7, 2949940), (10, 2064958), (14, 1474970), (19, 1086820), (20, 1032479), (28, 737485), (35, 589988), (38, 543410), (49, 421420), (70, 294994), (76, 271705), (95, 217364), (98, 210710), (133, 155260), (140, 147497), (190, 108682), (196, 105355), (245, 84284), (266, 77630), (380, 54341), (490, 42142), (532, 38815), (665, 31052), (931, 22180), (980, 21071), (1109, 18620), (1330, 15526), (1862, 11090), (2218, 9310), (2660, 7763), (3724, 5545), (4436, 4655)]