21691395

素因数分解:

$3^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{541}}^1$

素因数の和:575

約数の個数: 56

約数和(自身を含む): 42653232

約数和(自身を除く): 20961837

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 81, 99, 135, 165, 243, 297, 405, 495, 541, 729, 891, 1215, 1485, 1623, 2673, 2705, 3645, 4455, 4869, 5951, 8019, 8115, 13365, 14607, 17853, 24345, 29755, 40095, 43821, 53559, 73035, 89265, 131463, 160677, 219105, 267795, 394389, 482031, 657315, 803385, 1446093, 1971945, 2410155, 4338279, 7230465, 21691395]

約数ペア:

[(1, 21691395), (3, 7230465), (5, 4338279), (9, 2410155), (11, 1971945), (15, 1446093), (27, 803385), (33, 657315), (45, 482031), (55, 394389), (81, 267795), (99, 219105), (135, 160677), (165, 131463), (243, 89265), (297, 73035), (405, 53559), (495, 43821), (541, 40095), (729, 29755), (891, 24345), (1215, 17853), (1485, 14607), (1623, 13365), (2673, 8115), (2705, 8019), (3645, 5951), (4455, 4869)]