20216420

素因数分解:

$2^2\times 5^1\times 7^4\times {\mathrm{421}}^1$

素因数の和:458

約数の個数: 60

約数和(自身を含む): 49644924

約数和(自身を除く): 29428504

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 421, 490, 686, 842, 980, 1372, 1684, 1715, 2105, 2401, 2947, 3430, 4210, 4802, 5894, 6860, 8420, 9604, 11788, 12005, 14735, 20629, 24010, 29470, 41258, 48020, 58940, 82516, 103145, 144403, 206290, 288806, 412580, 577612, 722015, 1010821, 1444030, 2021642, 2888060, 4043284, 5054105, 10108210, 20216420]

約数ペア:

[(1, 20216420), (2, 10108210), (4, 5054105), (5, 4043284), (7, 2888060), (10, 2021642), (14, 1444030), (20, 1010821), (28, 722015), (35, 577612), (49, 412580), (70, 288806), (98, 206290), (140, 144403), (196, 103145), (245, 82516), (343, 58940), (421, 48020), (490, 41258), (686, 29470), (842, 24010), (980, 20629), (1372, 14735), (1684, 12005), (1715, 11788), (2105, 9604), (2401, 8420), (2947, 6860), (3430, 5894), (4210, 4802)]