18785620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{661}}^1$

素因数の和:713

約数の個数: 72

約数和(自身を含む): 47544840

約数和(自身を除く): 28759220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 661, 812, 980, 1015, 1322, 1421, 2030, 2644, 2842, 3305, 4060, 4627, 5684, 6610, 7105, 9254, 13220, 14210, 18508, 19169, 23135, 28420, 32389, 38338, 46270, 64778, 76676, 92540, 95845, 129556, 134183, 161945, 191690, 268366, 323890, 383380, 536732, 647780, 670915, 939281, 1341830, 1878562, 2683660, 3757124, 4696405, 9392810, 18785620]

約数ペア:

[(1, 18785620), (2, 9392810), (4, 4696405), (5, 3757124), (7, 2683660), (10, 1878562), (14, 1341830), (20, 939281), (28, 670915), (29, 647780), (35, 536732), (49, 383380), (58, 323890), (70, 268366), (98, 191690), (116, 161945), (140, 134183), (145, 129556), (196, 95845), (203, 92540), (245, 76676), (290, 64778), (406, 46270), (490, 38338), (580, 32389), (661, 28420), (812, 23135), (980, 19169), (1015, 18508), (1322, 14210), (1421, 13220), (2030, 9254), (2644, 7105), (2842, 6610), (3305, 5684), (4060, 4627)]