2581720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1$

素因数の和:152

約数の個数: 64

約数和(自身を含む): 6336000

約数和(自身を除く): 3754280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 43, 76, 79, 86, 95, 152, 158, 172, 190, 215, 316, 344, 380, 395, 430, 632, 760, 790, 817, 860, 1501, 1580, 1634, 1720, 3002, 3160, 3268, 3397, 4085, 6004, 6536, 6794, 7505, 8170, 12008, 13588, 15010, 16340, 16985, 27176, 30020, 32680, 33970, 60040, 64543, 67940, 129086, 135880, 258172, 322715, 516344, 645430, 1290860, 2581720]

約数ペア:

[(1, 2581720), (2, 1290860), (4, 645430), (5, 516344), (8, 322715), (10, 258172), (19, 135880), (20, 129086), (38, 67940), (40, 64543), (43, 60040), (76, 33970), (79, 32680), (86, 30020), (95, 27176), (152, 16985), (158, 16340), (172, 15010), (190, 13588), (215, 12008), (316, 8170), (344, 7505), (380, 6794), (395, 6536), (430, 6004), (632, 4085), (760, 3397), (790, 3268), (817, 3160), (860, 3002), (1501, 1720), (1580, 1634)]