21859120

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{197}}^1$

素因数の和:302

約数の個数: 80

約数和(自身を含む): 54505440

約数和(自身を除く): 32646320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 73, 76, 80, 95, 146, 152, 190, 197, 292, 304, 365, 380, 394, 584, 730, 760, 788, 985, 1168, 1387, 1460, 1520, 1576, 1970, 2774, 2920, 3152, 3743, 3940, 5548, 5840, 6935, 7486, 7880, 11096, 13870, 14381, 14972, 15760, 18715, 22192, 27740, 28762, 29944, 37430, 55480, 57524, 59888, 71905, 74860, 110960, 115048, 143810, 149720, 230096, 273239, 287620, 299440, 546478, 575240, 1092956, 1150480, 1366195, 2185912, 2732390, 4371824, 5464780, 10929560, 21859120]

約数ペア:

[(1, 21859120), (2, 10929560), (4, 5464780), (5, 4371824), (8, 2732390), (10, 2185912), (16, 1366195), (19, 1150480), (20, 1092956), (38, 575240), (40, 546478), (73, 299440), (76, 287620), (80, 273239), (95, 230096), (146, 149720), (152, 143810), (190, 115048), (197, 110960), (292, 74860), (304, 71905), (365, 59888), (380, 57524), (394, 55480), (584, 37430), (730, 29944), (760, 28762), (788, 27740), (985, 22192), (1168, 18715), (1387, 15760), (1460, 14972), (1520, 14381), (1576, 13870), (1970, 11096), (2774, 7880), (2920, 7486), (3152, 6935), (3743, 5840), (3940, 5548)]