640945905

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1019}}^1\times {\mathrm{2207}}^1$

素因数の和:3253

約数の個数: 32

約数和(自身を含む): 1081036800

約数和(自身を除く): 440090895

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 1019, 2207, 3057, 5095, 6621, 11035, 15285, 19361, 33105, 41933, 58083, 96805, 125799, 209665, 290415, 628995, 2248933, 6746799, 11244665, 33733995, 42729727, 128189181, 213648635, 640945905]

約数ペア:

[(1, 640945905), (3, 213648635), (5, 128189181), (15, 42729727), (19, 33733995), (57, 11244665), (95, 6746799), (285, 2248933), (1019, 628995), (2207, 290415), (3057, 209665), (5095, 125799), (6621, 96805), (11035, 58083), (15285, 41933), (19361, 33105)]