20911215

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 37050912

約数和(自身を除く): 16139697

約数列:

[1, 3, 5, 13, 15, 39, 65, 73, 113, 169, 195, 219, 339, 365, 507, 565, 845, 949, 1095, 1469, 1695, 2535, 2847, 4407, 4745, 7345, 8249, 12337, 14235, 19097, 22035, 24747, 37011, 41245, 57291, 61685, 95485, 107237, 123735, 185055, 286455, 321711, 536185, 1394081, 1608555, 4182243, 6970405, 20911215]

約数ペア:

[(1, 20911215), (3, 6970405), (5, 4182243), (13, 1608555), (15, 1394081), (39, 536185), (65, 321711), (73, 286455), (113, 185055), (169, 123735), (195, 107237), (219, 95485), (339, 61685), (365, 57291), (507, 41245), (565, 37011), (845, 24747), (949, 22035), (1095, 19097), (1469, 14235), (1695, 12337), (2535, 8249), (2847, 7345), (4407, 4745)]