199980380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{322549}}^1$

素因数の和:322589

約数の個数: 24

約数和(自身を含む): 433507200

約数和(自身を除く): 233526820

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 322549, 645098, 1290196, 1612745, 3225490, 6450980, 9999019, 19998038, 39996076, 49995095, 99990190, 199980380]

約数ペア:

[(1, 199980380), (2, 99990190), (4, 49995095), (5, 39996076), (10, 19998038), (20, 9999019), (31, 6450980), (62, 3225490), (124, 1612745), (155, 1290196), (310, 645098), (620, 322549)]