21577255

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1$

素因数の和:559

約数の個数: 32

約数和(自身を含む): 31656960

約数和(自身を除く): 10079705

約数列:

[1, 5, 7, 19, 35, 71, 95, 133, 355, 457, 497, 665, 1349, 2285, 2485, 3199, 6745, 8683, 9443, 15995, 32447, 43415, 47215, 60781, 162235, 227129, 303905, 616493, 1135645, 3082465, 4315451, 21577255]

約数ペア:

[(1, 21577255), (5, 4315451), (7, 3082465), (19, 1135645), (35, 616493), (71, 303905), (95, 227129), (133, 162235), (355, 60781), (457, 47215), (497, 43415), (665, 32447), (1349, 15995), (2285, 9443), (2485, 8683), (3199, 6745)]