21380065

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{317}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 30772224

約数和(自身を除く): 9392159

約数列:

[1, 5, 7, 35, 41, 47, 205, 235, 287, 317, 329, 1435, 1585, 1645, 1927, 2219, 9635, 11095, 12997, 13489, 14899, 64985, 67445, 74495, 90979, 104293, 454895, 521465, 610859, 3054295, 4276013, 21380065]

約数ペア:

[(1, 21380065), (5, 4276013), (7, 3054295), (35, 610859), (41, 521465), (47, 454895), (205, 104293), (235, 90979), (287, 74495), (317, 67445), (329, 64985), (1435, 14899), (1585, 13489), (1645, 12997), (1927, 11095), (2219, 9635)]