19710730

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:191

約数の個数: 64

約数和(自身を含む): 40578048

約数和(自身を除く): 20867318

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 67, 73, 130, 134, 146, 155, 310, 335, 365, 403, 670, 730, 806, 871, 949, 1742, 1898, 2015, 2077, 2263, 4030, 4154, 4355, 4526, 4745, 4891, 8710, 9490, 9782, 10385, 11315, 20770, 22630, 24455, 27001, 29419, 48910, 54002, 58838, 63583, 127166, 135005, 147095, 151621, 270010, 294190, 303242, 317915, 635830, 758105, 1516210, 1971073, 3942146, 9855365, 19710730]

約数ペア:

[(1, 19710730), (2, 9855365), (5, 3942146), (10, 1971073), (13, 1516210), (26, 758105), (31, 635830), (62, 317915), (65, 303242), (67, 294190), (73, 270010), (130, 151621), (134, 147095), (146, 135005), (155, 127166), (310, 63583), (335, 58838), (365, 54002), (403, 48910), (670, 29419), (730, 27001), (806, 24455), (871, 22630), (949, 20770), (1742, 11315), (1898, 10385), (2015, 9782), (2077, 9490), (2263, 8710), (4030, 4891), (4154, 4745), (4355, 4526)]