21905275

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 32997888

約数和(自身を除く): 11092613

約数列:

[1, 5, 7, 25, 35, 41, 43, 71, 175, 205, 215, 287, 301, 355, 497, 1025, 1075, 1435, 1505, 1763, 1775, 2485, 2911, 3053, 7175, 7525, 8815, 12341, 12425, 14555, 15265, 20377, 21371, 44075, 61705, 72775, 76325, 101885, 106855, 125173, 308525, 509425, 534275, 625865, 876211, 3129325, 4381055, 21905275]

約数ペア:

[(1, 21905275), (5, 4381055), (7, 3129325), (25, 876211), (35, 625865), (41, 534275), (43, 509425), (71, 308525), (175, 125173), (205, 106855), (215, 101885), (287, 76325), (301, 72775), (355, 61705), (497, 44075), (1025, 21371), (1075, 20377), (1435, 15265), (1505, 14555), (1763, 12425), (1775, 12341), (2485, 8815), (2911, 7525), (3053, 7175)]