209749840

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{13309}}^1$

素因数の和:13519

約数の個数: 40

約数和(自身を含む): 490180680

約数和(自身を除く): 280430840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 13309, 15760, 26618, 53236, 66545, 106472, 133090, 212944, 266180, 532360, 1064720, 2621873, 5243746, 10487492, 13109365, 20974984, 26218730, 41949968, 52437460, 104874920, 209749840]

約数ペア:

[(1, 209749840), (2, 104874920), (4, 52437460), (5, 41949968), (8, 26218730), (10, 20974984), (16, 13109365), (20, 10487492), (40, 5243746), (80, 2621873), (197, 1064720), (394, 532360), (788, 266180), (985, 212944), (1576, 133090), (1970, 106472), (3152, 66545), (3940, 53236), (7880, 26618), (13309, 15760)]