19439740

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1\times {\mathrm{157}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 42364224

約数和(自身を除く): 22924484

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 151, 157, 164, 205, 302, 314, 410, 604, 628, 755, 785, 820, 1510, 1570, 3020, 3140, 6191, 6437, 12382, 12874, 23707, 24764, 25748, 30955, 32185, 47414, 61910, 64370, 94828, 118535, 123820, 128740, 237070, 474140, 971987, 1943974, 3887948, 4859935, 9719870, 19439740]

約数ペア:

[(1, 19439740), (2, 9719870), (4, 4859935), (5, 3887948), (10, 1943974), (20, 971987), (41, 474140), (82, 237070), (151, 128740), (157, 123820), (164, 118535), (205, 94828), (302, 64370), (314, 61910), (410, 47414), (604, 32185), (628, 30955), (755, 25748), (785, 24764), (820, 23707), (1510, 12874), (1570, 12382), (3020, 6437), (3140, 6191)]