21381210

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{673}}^1$

素因数の和:1039

約数の個数: 48

約数和(自身を含む): 55831464

約数和(自身を除く): 34450254

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 353, 673, 706, 1059, 1346, 1765, 2019, 2118, 3177, 3365, 3530, 4038, 5295, 6057, 6354, 6730, 10095, 10590, 12114, 15885, 20190, 30285, 31770, 60570, 237569, 475138, 712707, 1187845, 1425414, 2138121, 2375690, 3563535, 4276242, 7127070, 10690605, 21381210]

約数ペア:

[(1, 21381210), (2, 10690605), (3, 7127070), (5, 4276242), (6, 3563535), (9, 2375690), (10, 2138121), (15, 1425414), (18, 1187845), (30, 712707), (45, 475138), (90, 237569), (353, 60570), (673, 31770), (706, 30285), (1059, 20190), (1346, 15885), (1765, 12114), (2019, 10590), (2118, 10095), (3177, 6730), (3365, 6354), (3530, 6057), (4038, 5295)]