178000020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89899}}^1$

素因数の和:89925

約数の個数: 72

約数和(自身を含む): 589024800

約数和(自身を除く): 411024780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 89899, 179798, 269697, 359596, 449495, 539394, 809091, 898990, 988889, 1078788, 1348485, 1618182, 1797980, 1977778, 2696970, 2966667, 3236364, 3955556, 4045455, 4944445, 5393940, 5933334, 8090910, 8900001, 9888890, 11866668, 14833335, 16181820, 17800002, 19777780, 29666670, 35600004, 44500005, 59333340, 89000010, 178000020]

約数ペア:

[(1, 178000020), (2, 89000010), (3, 59333340), (4, 44500005), (5, 35600004), (6, 29666670), (9, 19777780), (10, 17800002), (11, 16181820), (12, 14833335), (15, 11866668), (18, 9888890), (20, 8900001), (22, 8090910), (30, 5933334), (33, 5393940), (36, 4944445), (44, 4045455), (45, 3955556), (55, 3236364), (60, 2966667), (66, 2696970), (90, 1977778), (99, 1797980), (110, 1618182), (132, 1348485), (165, 1078788), (180, 988889), (198, 898990), (220, 809091), (330, 539394), (396, 449495), (495, 359596), (660, 269697), (990, 179798), (1980, 89899)]