81518920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{2671}}^1$

素因数の和:2798

約数の個数: 64

約数和(自身を含む): 211622400

約数和(自身を除く): 130103480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 763, 872, 1090, 1526, 2180, 2671, 3052, 3815, 4360, 5342, 6104, 7630, 10684, 13355, 15260, 18697, 21368, 26710, 30520, 37394, 53420, 74788, 93485, 106840, 149576, 186970, 291139, 373940, 582278, 747880, 1164556, 1455695, 2037973, 2329112, 2911390, 4075946, 5822780, 8151892, 10189865, 11645560, 16303784, 20379730, 40759460, 81518920]

約数ペア:

[(1, 81518920), (2, 40759460), (4, 20379730), (5, 16303784), (7, 11645560), (8, 10189865), (10, 8151892), (14, 5822780), (20, 4075946), (28, 2911390), (35, 2329112), (40, 2037973), (56, 1455695), (70, 1164556), (109, 747880), (140, 582278), (218, 373940), (280, 291139), (436, 186970), (545, 149576), (763, 106840), (872, 93485), (1090, 74788), (1526, 53420), (2180, 37394), (2671, 30520), (3052, 26710), (3815, 21368), (4360, 18697), (5342, 15260), (6104, 13355), (7630, 10684)]