21205233

素因数分解:

$3^4\times 7^1\times {\mathrm{149}}^1\times {\mathrm{251}}^1$

素因数の和:419

約数の個数: 40

約数和(自身を含む): 36590400

約数和(自身を除く): 15385167

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 149, 189, 251, 447, 567, 753, 1043, 1341, 1757, 2259, 3129, 4023, 5271, 6777, 9387, 12069, 15813, 20331, 28161, 37399, 47439, 84483, 112197, 142317, 261793, 336591, 785379, 1009773, 2356137, 3029319, 7068411, 21205233]

約数ペア:

[(1, 21205233), (3, 7068411), (7, 3029319), (9, 2356137), (21, 1009773), (27, 785379), (63, 336591), (81, 261793), (149, 142317), (189, 112197), (251, 84483), (447, 47439), (567, 37399), (753, 28161), (1043, 20331), (1341, 15813), (1757, 12069), (2259, 9387), (3129, 6777), (4023, 5271)]