31308940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 72863280

約数和(自身を除く): 41554340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 157, 169, 236, 260, 295, 314, 338, 590, 628, 676, 767, 785, 845, 1180, 1534, 1570, 1690, 2041, 3068, 3140, 3380, 3835, 4082, 7670, 8164, 9263, 9971, 10205, 15340, 18526, 19942, 20410, 26533, 37052, 39884, 40820, 46315, 49855, 53066, 92630, 99710, 106132, 120419, 132665, 185260, 199420, 240838, 265330, 481676, 530660, 602095, 1204190, 1565447, 2408380, 3130894, 6261788, 7827235, 15654470, 31308940]

約数ペア:

[(1, 31308940), (2, 15654470), (4, 7827235), (5, 6261788), (10, 3130894), (13, 2408380), (20, 1565447), (26, 1204190), (52, 602095), (59, 530660), (65, 481676), (118, 265330), (130, 240838), (157, 199420), (169, 185260), (236, 132665), (260, 120419), (295, 106132), (314, 99710), (338, 92630), (590, 53066), (628, 49855), (676, 46315), (767, 40820), (785, 39884), (845, 37052), (1180, 26533), (1534, 20410), (1570, 19942), (1690, 18526), (2041, 15340), (3068, 10205), (3140, 9971), (3380, 9263), (3835, 8164), (4082, 7670)]