21250221

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{13441}}^1$

素因数の和:13492

約数の個数: 16

約数和(自身を含む): 30970368

約数和(自身を除く): 9720147

約数列:

[1, 3, 17, 31, 51, 93, 527, 1581, 13441, 40323, 228497, 416671, 685491, 1250013, 7083407, 21250221]

約数ペア:

[(1, 21250221), (3, 7083407), (17, 1250013), (31, 685491), (51, 416671), (93, 228497), (527, 40323), (1581, 13441)]