21085980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{457}}^1\times {\mathrm{769}}^1$

素因数の和:1238

約数の個数: 48

約数和(自身を含む): 59246880

約数和(自身を除く): 38160900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 457, 769, 914, 1371, 1538, 1828, 2285, 2307, 2742, 3076, 3845, 4570, 4614, 5484, 6855, 7690, 9140, 9228, 11535, 13710, 15380, 23070, 27420, 46140, 351433, 702866, 1054299, 1405732, 1757165, 2108598, 3514330, 4217196, 5271495, 7028660, 10542990, 21085980]

約数ペア:

[(1, 21085980), (2, 10542990), (3, 7028660), (4, 5271495), (5, 4217196), (6, 3514330), (10, 2108598), (12, 1757165), (15, 1405732), (20, 1054299), (30, 702866), (60, 351433), (457, 46140), (769, 27420), (914, 23070), (1371, 15380), (1538, 13710), (1828, 11535), (2285, 9228), (2307, 9140), (2742, 7690), (3076, 6855), (3845, 5484), (4570, 4614)]