216806380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{1123}}^1$

素因数の和:1343

約数の個数: 72

約数和(自身を含む): 532789488

約数和(自身を除く): 315983108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 197, 245, 394, 490, 788, 980, 985, 1123, 1379, 1970, 2246, 2758, 3940, 4492, 5516, 5615, 6895, 7861, 9653, 11230, 13790, 15722, 19306, 22460, 27580, 31444, 38612, 39305, 48265, 55027, 78610, 96530, 110054, 157220, 193060, 220108, 221231, 275135, 442462, 550270, 884924, 1100540, 1106155, 1548617, 2212310, 3097234, 4424620, 6194468, 7743085, 10840319, 15486170, 21680638, 30972340, 43361276, 54201595, 108403190, 216806380]

約数ペア:

[(1, 216806380), (2, 108403190), (4, 54201595), (5, 43361276), (7, 30972340), (10, 21680638), (14, 15486170), (20, 10840319), (28, 7743085), (35, 6194468), (49, 4424620), (70, 3097234), (98, 2212310), (140, 1548617), (196, 1106155), (197, 1100540), (245, 884924), (394, 550270), (490, 442462), (788, 275135), (980, 221231), (985, 220108), (1123, 193060), (1379, 157220), (1970, 110054), (2246, 96530), (2758, 78610), (3940, 55027), (4492, 48265), (5516, 39305), (5615, 38612), (6895, 31444), (7861, 27580), (9653, 22460), (11230, 19306), (13790, 15722)]