21129808

素因数分解:

$2^4\times 7^1\times {\mathrm{83}}^1\times {\mathrm{2273}}^1$

素因数の和:2371

約数の個数: 40

約数和(自身を含む): 47371968

約数和(自身を除く): 26242160

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 83, 112, 166, 332, 581, 664, 1162, 1328, 2273, 2324, 4546, 4648, 9092, 9296, 15911, 18184, 31822, 36368, 63644, 127288, 188659, 254576, 377318, 754636, 1320613, 1509272, 2641226, 3018544, 5282452, 10564904, 21129808]

約数ペア:

[(1, 21129808), (2, 10564904), (4, 5282452), (7, 3018544), (8, 2641226), (14, 1509272), (16, 1320613), (28, 754636), (56, 377318), (83, 254576), (112, 188659), (166, 127288), (332, 63644), (581, 36368), (664, 31822), (1162, 18184), (1328, 15911), (2273, 9296), (2324, 9092), (4546, 4648)]