12687920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:322

約数の個数: 80

約数和(自身を含む): 34164480

約数和(自身を除く): 21476560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 139, 140, 163, 278, 280, 326, 556, 560, 652, 695, 815, 973, 1112, 1141, 1304, 1390, 1630, 1946, 2224, 2282, 2608, 2780, 3260, 3892, 4564, 4865, 5560, 5705, 6520, 7784, 9128, 9730, 11120, 11410, 13040, 15568, 18256, 19460, 22657, 22820, 38920, 45314, 45640, 77840, 90628, 91280, 113285, 158599, 181256, 226570, 317198, 362512, 453140, 634396, 792995, 906280, 1268792, 1585990, 1812560, 2537584, 3171980, 6343960, 12687920]

約数ペア:

[(1, 12687920), (2, 6343960), (4, 3171980), (5, 2537584), (7, 1812560), (8, 1585990), (10, 1268792), (14, 906280), (16, 792995), (20, 634396), (28, 453140), (35, 362512), (40, 317198), (56, 226570), (70, 181256), (80, 158599), (112, 113285), (139, 91280), (140, 90628), (163, 77840), (278, 45640), (280, 45314), (326, 38920), (556, 22820), (560, 22657), (652, 19460), (695, 18256), (815, 15568), (973, 13040), (1112, 11410), (1141, 11120), (1304, 9730), (1390, 9128), (1630, 7784), (1946, 6520), (2224, 5705), (2282, 5560), (2608, 4865), (2780, 4564), (3260, 3892)]