78687868

素因数分解:

$2^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:502

約数の個数: 48

約数和(自身を含む): 161267904

約数和(自身を除く): 82580036

約数列:

[1, 2, 4, 7, 14, 28, 73, 137, 146, 274, 281, 292, 511, 548, 562, 959, 1022, 1124, 1918, 1967, 2044, 3836, 3934, 7868, 10001, 20002, 20513, 38497, 40004, 41026, 70007, 76994, 82052, 140014, 143591, 153988, 269479, 280028, 287182, 538958, 574364, 1077916, 2810281, 5620562, 11241124, 19671967, 39343934, 78687868]

約数ペア:

[(1, 78687868), (2, 39343934), (4, 19671967), (7, 11241124), (14, 5620562), (28, 2810281), (73, 1077916), (137, 574364), (146, 538958), (274, 287182), (281, 280028), (292, 269479), (511, 153988), (548, 143591), (562, 140014), (959, 82052), (1022, 76994), (1124, 70007), (1918, 41026), (1967, 40004), (2044, 38497), (3836, 20513), (3934, 20002), (7868, 10001)]