205715580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{489799}}^1$

素因数の和:489818

約数の個数: 48

約数和(自身を含む): 658291200

約数和(自身を除く): 452575620

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 489799, 979598, 1469397, 1959196, 2448995, 2938794, 3428593, 4897990, 5877588, 6857186, 7346985, 9795980, 10285779, 13714372, 14693970, 17142965, 20571558, 29387940, 34285930, 41143116, 51428895, 68571860, 102857790, 205715580]

約数ペア:

[(1, 205715580), (2, 102857790), (3, 68571860), (4, 51428895), (5, 41143116), (6, 34285930), (7, 29387940), (10, 20571558), (12, 17142965), (14, 14693970), (15, 13714372), (20, 10285779), (21, 9795980), (28, 7346985), (30, 6857186), (35, 5877588), (42, 4897990), (60, 3428593), (70, 2938794), (84, 2448995), (105, 1959196), (140, 1469397), (210, 979598), (420, 489799)]