648654580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{65257}}^1$

素因数の和:65344

約数の個数: 48

約数和(自身を含む): 1578721536

約数和(自身を除く): 930066956

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 65257, 130514, 261028, 326285, 456799, 652570, 913598, 1305140, 1827196, 2283995, 4567990, 4633247, 9135980, 9266494, 18532988, 23166235, 32432729, 46332470, 64865458, 92664940, 129730916, 162163645, 324327290, 648654580]

約数ペア:

[(1, 648654580), (2, 324327290), (4, 162163645), (5, 129730916), (7, 92664940), (10, 64865458), (14, 46332470), (20, 32432729), (28, 23166235), (35, 18532988), (70, 9266494), (71, 9135980), (140, 4633247), (142, 4567990), (284, 2283995), (355, 1827196), (497, 1305140), (710, 913598), (994, 652570), (1420, 456799), (1988, 326285), (2485, 261028), (4970, 130514), (9940, 65257)]