21290460

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{20873}}^1$

素因数の和:20902

約数の個数: 48

約数和(自身を含む): 63122976

約数和(自身を除く): 41832516

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 20873, 41746, 62619, 83492, 104365, 125238, 208730, 250476, 313095, 354841, 417460, 626190, 709682, 1064523, 1252380, 1419364, 1774205, 2129046, 3548410, 4258092, 5322615, 7096820, 10645230, 21290460]

約数ペア:

[(1, 21290460), (2, 10645230), (3, 7096820), (4, 5322615), (5, 4258092), (6, 3548410), (10, 2129046), (12, 1774205), (15, 1419364), (17, 1252380), (20, 1064523), (30, 709682), (34, 626190), (51, 417460), (60, 354841), (68, 313095), (85, 250476), (102, 208730), (170, 125238), (204, 104365), (255, 83492), (340, 62619), (510, 41746), (1020, 20873)]