21429261

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^2\times {\mathrm{643}}^1$

素因数の和:702

約数の個数: 36

約数和(自身を含む): 37037728

約数和(自身を除く): 15608467

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 161, 207, 483, 529, 643, 1449, 1587, 1929, 3703, 4501, 4761, 5787, 11109, 13503, 14789, 33327, 40509, 44367, 103523, 133101, 310569, 340147, 931707, 1020441, 2381029, 3061323, 7143087, 21429261]

約数ペア:

[(1, 21429261), (3, 7143087), (7, 3061323), (9, 2381029), (21, 1020441), (23, 931707), (63, 340147), (69, 310569), (161, 133101), (207, 103523), (483, 44367), (529, 40509), (643, 33327), (1449, 14789), (1587, 13503), (1929, 11109), (3703, 5787), (4501, 4761)]