90418660

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{643}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 194745600

約数和(自身を除く): 104326940

約数列:

[1, 2, 4, 5, 10, 20, 79, 89, 158, 178, 316, 356, 395, 445, 643, 790, 890, 1286, 1580, 1780, 2572, 3215, 6430, 7031, 12860, 14062, 28124, 35155, 50797, 57227, 70310, 101594, 114454, 140620, 203188, 228908, 253985, 286135, 507970, 572270, 1015940, 1144540, 4520933, 9041866, 18083732, 22604665, 45209330, 90418660]

約数ペア:

[(1, 90418660), (2, 45209330), (4, 22604665), (5, 18083732), (10, 9041866), (20, 4520933), (79, 1144540), (89, 1015940), (158, 572270), (178, 507970), (316, 286135), (356, 253985), (395, 228908), (445, 203188), (643, 140620), (790, 114454), (890, 101594), (1286, 70310), (1580, 57227), (1780, 50797), (2572, 35155), (3215, 28124), (6430, 14062), (7031, 12860)]