19917320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{359}}^1$

素因数の和:462

約数の個数: 64

約数和(自身を含む): 47952000

約数和(自身を除く): 28034680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 73, 76, 95, 146, 152, 190, 292, 359, 365, 380, 584, 718, 730, 760, 1387, 1436, 1460, 1795, 2774, 2872, 2920, 3590, 5548, 6821, 6935, 7180, 11096, 13642, 13870, 14360, 26207, 27284, 27740, 34105, 52414, 54568, 55480, 68210, 104828, 131035, 136420, 209656, 262070, 272840, 497933, 524140, 995866, 1048280, 1991732, 2489665, 3983464, 4979330, 9958660, 19917320]

約数ペア:

[(1, 19917320), (2, 9958660), (4, 4979330), (5, 3983464), (8, 2489665), (10, 1991732), (19, 1048280), (20, 995866), (38, 524140), (40, 497933), (73, 272840), (76, 262070), (95, 209656), (146, 136420), (152, 131035), (190, 104828), (292, 68210), (359, 55480), (365, 54568), (380, 52414), (584, 34105), (718, 27740), (730, 27284), (760, 26207), (1387, 14360), (1436, 13870), (1460, 13642), (1795, 11096), (2774, 7180), (2872, 6935), (2920, 6821), (3590, 5548)]