81529340

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1\times {\mathrm{281}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 174817440

約数和(自身を除く): 93288100

約数列:

[1, 2, 4, 5, 10, 20, 89, 163, 178, 281, 326, 356, 445, 562, 652, 815, 890, 1124, 1405, 1630, 1780, 2810, 3260, 5620, 14507, 25009, 29014, 45803, 50018, 58028, 72535, 91606, 100036, 125045, 145070, 183212, 229015, 250090, 290140, 458030, 500180, 916060, 4076467, 8152934, 16305868, 20382335, 40764670, 81529340]

約数ペア:

[(1, 81529340), (2, 40764670), (4, 20382335), (5, 16305868), (10, 8152934), (20, 4076467), (89, 916060), (163, 500180), (178, 458030), (281, 290140), (326, 250090), (356, 229015), (445, 183212), (562, 145070), (652, 125045), (815, 100036), (890, 91606), (1124, 72535), (1405, 58028), (1630, 50018), (1780, 45803), (2810, 29014), (3260, 25009), (5620, 14507)]