21683920

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 52853760

約数和(自身を除く): 31169840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 73, 79, 80, 94, 146, 158, 188, 235, 292, 316, 365, 376, 395, 470, 584, 632, 730, 752, 790, 940, 1168, 1264, 1460, 1580, 1880, 2920, 3160, 3431, 3713, 3760, 5767, 5840, 6320, 6862, 7426, 11534, 13724, 14852, 17155, 18565, 23068, 27448, 28835, 29704, 34310, 37130, 46136, 54896, 57670, 59408, 68620, 74260, 92272, 115340, 137240, 148520, 230680, 271049, 274480, 297040, 461360, 542098, 1084196, 1355245, 2168392, 2710490, 4336784, 5420980, 10841960, 21683920]

約数ペア:

[(1, 21683920), (2, 10841960), (4, 5420980), (5, 4336784), (8, 2710490), (10, 2168392), (16, 1355245), (20, 1084196), (40, 542098), (47, 461360), (73, 297040), (79, 274480), (80, 271049), (94, 230680), (146, 148520), (158, 137240), (188, 115340), (235, 92272), (292, 74260), (316, 68620), (365, 59408), (376, 57670), (395, 54896), (470, 46136), (584, 37130), (632, 34310), (730, 29704), (752, 28835), (790, 27448), (940, 23068), (1168, 18565), (1264, 17155), (1460, 14852), (1580, 13724), (1880, 11534), (2920, 7426), (3160, 6862), (3431, 6320), (3713, 5840), (3760, 5767)]