19802140

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{151}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 23098340

約数列:

[1, 2, 4, 5, 10, 20, 79, 83, 151, 158, 166, 302, 316, 332, 395, 415, 604, 755, 790, 830, 1510, 1580, 1660, 3020, 6557, 11929, 12533, 13114, 23858, 25066, 26228, 32785, 47716, 50132, 59645, 62665, 65570, 119290, 125330, 131140, 238580, 250660, 990107, 1980214, 3960428, 4950535, 9901070, 19802140]

約数ペア:

[(1, 19802140), (2, 9901070), (4, 4950535), (5, 3960428), (10, 1980214), (20, 990107), (79, 250660), (83, 238580), (151, 131140), (158, 125330), (166, 119290), (302, 65570), (316, 62665), (332, 59645), (395, 50132), (415, 47716), (604, 32785), (755, 26228), (790, 25066), (830, 23858), (1510, 13114), (1580, 12533), (1660, 11929), (3020, 6557)]