21526640

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6563}}^1$

素因数の和:6617

約数の個数: 40

約数和(自身を含む): 51277968

約数和(自身を除く): 29751328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6563, 13126, 26252, 32815, 52504, 65630, 105008, 131260, 262520, 269083, 525040, 538166, 1076332, 1345415, 2152664, 2690830, 4305328, 5381660, 10763320, 21526640]

約数ペア:

[(1, 21526640), (2, 10763320), (4, 5381660), (5, 4305328), (8, 2690830), (10, 2152664), (16, 1345415), (20, 1076332), (40, 538166), (41, 525040), (80, 269083), (82, 262520), (164, 131260), (205, 105008), (328, 65630), (410, 52504), (656, 32815), (820, 26252), (1640, 13126), (3280, 6563)]