17978440

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1$

素因数の和:262

約数の個数: 64

約数和(自身を含む): 42197760

約数和(自身を除く): 24219320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 73, 94, 131, 146, 188, 235, 262, 292, 365, 376, 470, 524, 584, 655, 730, 940, 1048, 1310, 1460, 1880, 2620, 2920, 3431, 5240, 6157, 6862, 9563, 12314, 13724, 17155, 19126, 24628, 27448, 30785, 34310, 38252, 47815, 49256, 61570, 68620, 76504, 95630, 123140, 137240, 191260, 246280, 382520, 449461, 898922, 1797844, 2247305, 3595688, 4494610, 8989220, 17978440]

約数ペア:

[(1, 17978440), (2, 8989220), (4, 4494610), (5, 3595688), (8, 2247305), (10, 1797844), (20, 898922), (40, 449461), (47, 382520), (73, 246280), (94, 191260), (131, 137240), (146, 123140), (188, 95630), (235, 76504), (262, 68620), (292, 61570), (365, 49256), (376, 47815), (470, 38252), (524, 34310), (584, 30785), (655, 27448), (730, 24628), (940, 19126), (1048, 17155), (1310, 13724), (1460, 12314), (1880, 9563), (2620, 6862), (2920, 6157), (3431, 5240)]