21900945

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19571055

約数列:

[1, 3, 5, 11, 15, 23, 29, 33, 55, 69, 87, 115, 145, 165, 199, 253, 319, 345, 435, 597, 667, 759, 957, 995, 1265, 1595, 2001, 2189, 2985, 3335, 3795, 4577, 4785, 5771, 6567, 7337, 10005, 10945, 13731, 17313, 22011, 22885, 28855, 32835, 36685, 50347, 63481, 68655, 86565, 110055, 132733, 151041, 190443, 251735, 317405, 398199, 663665, 755205, 952215, 1460063, 1990995, 4380189, 7300315, 21900945]

約数ペア:

[(1, 21900945), (3, 7300315), (5, 4380189), (11, 1990995), (15, 1460063), (23, 952215), (29, 755205), (33, 663665), (55, 398199), (69, 317405), (87, 251735), (115, 190443), (145, 151041), (165, 132733), (199, 110055), (253, 86565), (319, 68655), (345, 63481), (435, 50347), (597, 36685), (667, 32835), (759, 28855), (957, 22885), (995, 22011), (1265, 17313), (1595, 13731), (2001, 10945), (2189, 10005), (2985, 7337), (3335, 6567), (3795, 5771), (4577, 4785)]