665980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 1645056

約数和(自身を除く): 979076

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 67, 70, 71, 134, 140, 142, 268, 284, 335, 355, 469, 497, 670, 710, 938, 994, 1340, 1420, 1876, 1988, 2345, 2485, 4690, 4757, 4970, 9380, 9514, 9940, 19028, 23785, 33299, 47570, 66598, 95140, 133196, 166495, 332990, 665980]

約数ペア:

[(1, 665980), (2, 332990), (4, 166495), (5, 133196), (7, 95140), (10, 66598), (14, 47570), (20, 33299), (28, 23785), (35, 19028), (67, 9940), (70, 9514), (71, 9380), (134, 4970), (140, 4757), (142, 4690), (268, 2485), (284, 2345), (335, 1988), (355, 1876), (469, 1420), (497, 1340), (670, 994), (710, 938)]