18979660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 47056464

約数和(自身を除く): 28076804

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 107, 140, 181, 196, 214, 245, 362, 428, 490, 535, 724, 749, 905, 980, 1070, 1267, 1498, 1810, 2140, 2534, 2996, 3620, 3745, 5068, 5243, 6335, 7490, 8869, 10486, 12670, 14980, 17738, 19367, 20972, 25340, 26215, 35476, 38734, 44345, 52430, 77468, 88690, 96835, 104860, 135569, 177380, 193670, 271138, 387340, 542276, 677845, 948983, 1355690, 1897966, 2711380, 3795932, 4744915, 9489830, 18979660]

約数ペア:

[(1, 18979660), (2, 9489830), (4, 4744915), (5, 3795932), (7, 2711380), (10, 1897966), (14, 1355690), (20, 948983), (28, 677845), (35, 542276), (49, 387340), (70, 271138), (98, 193670), (107, 177380), (140, 135569), (181, 104860), (196, 96835), (214, 88690), (245, 77468), (362, 52430), (428, 44345), (490, 38734), (535, 35476), (724, 26215), (749, 25340), (905, 20972), (980, 19367), (1070, 17738), (1267, 14980), (1498, 12670), (1810, 10486), (2140, 8869), (2534, 7490), (2996, 6335), (3620, 5243), (3745, 5068)]