208979820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{165857}}^1$

素因数の和:165879

約数の個数: 72

約数和(自身を含む): 724467744

約数和(自身を除く): 515487924

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 165857, 331714, 497571, 663428, 829285, 995142, 1160999, 1492713, 1658570, 1990284, 2321998, 2487855, 2985426, 3317140, 3482997, 4643996, 4975710, 5804995, 5970852, 6965994, 7463565, 9951420, 10448991, 11609990, 13931988, 14927130, 17414985, 20897982, 23219980, 29854260, 34829970, 41795964, 52244955, 69659940, 104489910, 208979820]

約数ペア:

[(1, 208979820), (2, 104489910), (3, 69659940), (4, 52244955), (5, 41795964), (6, 34829970), (7, 29854260), (9, 23219980), (10, 20897982), (12, 17414985), (14, 14927130), (15, 13931988), (18, 11609990), (20, 10448991), (21, 9951420), (28, 7463565), (30, 6965994), (35, 5970852), (36, 5804995), (42, 4975710), (45, 4643996), (60, 3482997), (63, 3317140), (70, 2985426), (84, 2487855), (90, 2321998), (105, 1990284), (126, 1658570), (140, 1492713), (180, 1160999), (210, 995142), (252, 829285), (315, 663428), (420, 497571), (630, 331714), (1260, 165857)]