21695905

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 33707520

約数和(自身を除く): 12011615

約数列:

[1, 5, 7, 11, 35, 47, 55, 77, 109, 121, 235, 329, 385, 517, 545, 605, 763, 847, 1199, 1645, 2585, 3619, 3815, 4235, 5123, 5687, 5995, 8393, 13189, 18095, 25615, 28435, 35861, 39809, 41965, 56353, 65945, 92323, 179305, 199045, 281765, 394471, 461615, 619883, 1972355, 3099415, 4339181, 21695905]

約数ペア:

[(1, 21695905), (5, 4339181), (7, 3099415), (11, 1972355), (35, 619883), (47, 461615), (55, 394471), (77, 281765), (109, 199045), (121, 179305), (235, 92323), (329, 65945), (385, 56353), (517, 41965), (545, 39809), (605, 35861), (763, 28435), (847, 25615), (1199, 18095), (1645, 13189), (2585, 8393), (3619, 5995), (3815, 5687), (4235, 5123)]