31880420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:261

約数の個数: 96

約数和(自身を含む): 80269056

約数和(自身を除く): 48388636

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 71, 110, 130, 142, 143, 157, 220, 260, 284, 286, 314, 355, 572, 628, 710, 715, 781, 785, 923, 1420, 1430, 1562, 1570, 1727, 1846, 2041, 2860, 3124, 3140, 3454, 3692, 3905, 4082, 4615, 6908, 7810, 8164, 8635, 9230, 10153, 10205, 11147, 15620, 17270, 18460, 20306, 20410, 22294, 22451, 34540, 40612, 40820, 44588, 44902, 50765, 55735, 89804, 101530, 111470, 112255, 122617, 144911, 203060, 222940, 224510, 245234, 289822, 449020, 490468, 579644, 613085, 724555, 1226170, 1449110, 1594021, 2452340, 2898220, 3188042, 6376084, 7970105, 15940210, 31880420]

約数ペア:

[(1, 31880420), (2, 15940210), (4, 7970105), (5, 6376084), (10, 3188042), (11, 2898220), (13, 2452340), (20, 1594021), (22, 1449110), (26, 1226170), (44, 724555), (52, 613085), (55, 579644), (65, 490468), (71, 449020), (110, 289822), (130, 245234), (142, 224510), (143, 222940), (157, 203060), (220, 144911), (260, 122617), (284, 112255), (286, 111470), (314, 101530), (355, 89804), (572, 55735), (628, 50765), (710, 44902), (715, 44588), (781, 40820), (785, 40612), (923, 34540), (1420, 22451), (1430, 22294), (1562, 20410), (1570, 20306), (1727, 18460), (1846, 17270), (2041, 15620), (2860, 11147), (3124, 10205), (3140, 10153), (3454, 9230), (3692, 8635), (3905, 8164), (4082, 7810), (4615, 6908)]