18642680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{479}}^1$

素因数の和:636

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 29741320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 479, 556, 695, 958, 973, 1112, 1390, 1916, 1946, 2395, 2780, 3353, 3832, 3892, 4790, 4865, 5560, 6706, 7784, 9580, 9730, 13412, 16765, 19160, 19460, 26824, 33530, 38920, 66581, 67060, 133162, 134120, 266324, 332905, 466067, 532648, 665810, 932134, 1331620, 1864268, 2330335, 2663240, 3728536, 4660670, 9321340, 18642680]

約数ペア:

[(1, 18642680), (2, 9321340), (4, 4660670), (5, 3728536), (7, 2663240), (8, 2330335), (10, 1864268), (14, 1331620), (20, 932134), (28, 665810), (35, 532648), (40, 466067), (56, 332905), (70, 266324), (139, 134120), (140, 133162), (278, 67060), (280, 66581), (479, 38920), (556, 33530), (695, 26824), (958, 19460), (973, 19160), (1112, 16765), (1390, 13412), (1916, 9730), (1946, 9580), (2395, 7784), (2780, 6706), (3353, 5560), (3832, 4865), (3892, 4790)]