20737000

素因数分解:

$2^3\times 5^3\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:343

約数の個数: 64

約数和(自身を含む): 49280400

約数和(自身を除く): 28543400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 89, 100, 125, 178, 200, 233, 250, 356, 445, 466, 500, 712, 890, 932, 1000, 1165, 1780, 1864, 2225, 2330, 3560, 4450, 4660, 5825, 8900, 9320, 11125, 11650, 17800, 20737, 22250, 23300, 29125, 41474, 44500, 46600, 58250, 82948, 89000, 103685, 116500, 165896, 207370, 233000, 414740, 518425, 829480, 1036850, 2073700, 2592125, 4147400, 5184250, 10368500, 20737000]

約数ペア:

[(1, 20737000), (2, 10368500), (4, 5184250), (5, 4147400), (8, 2592125), (10, 2073700), (20, 1036850), (25, 829480), (40, 518425), (50, 414740), (89, 233000), (100, 207370), (125, 165896), (178, 116500), (200, 103685), (233, 89000), (250, 82948), (356, 58250), (445, 46600), (466, 44500), (500, 41474), (712, 29125), (890, 23300), (932, 22250), (1000, 20737), (1165, 17800), (1780, 11650), (1864, 11125), (2225, 9320), (2330, 8900), (3560, 5825), (4450, 4660)]