78487780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{2657}}^1$

素因数の和:2884

約数の個数: 48

約数和(自身を含む): 189334656

約数和(自身を除く): 110846876

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 844, 1055, 1477, 2110, 2657, 2954, 4220, 5314, 5908, 7385, 10628, 13285, 14770, 18599, 26570, 29540, 37198, 53140, 74396, 92995, 185990, 371980, 560627, 1121254, 2242508, 2803135, 3924389, 5606270, 7848778, 11212540, 15697556, 19621945, 39243890, 78487780]

約数ペア:

[(1, 78487780), (2, 39243890), (4, 19621945), (5, 15697556), (7, 11212540), (10, 7848778), (14, 5606270), (20, 3924389), (28, 2803135), (35, 2242508), (70, 1121254), (140, 560627), (211, 371980), (422, 185990), (844, 92995), (1055, 74396), (1477, 53140), (2110, 37198), (2657, 29540), (2954, 26570), (4220, 18599), (5314, 14770), (5908, 13285), (7385, 10628)]