21209517

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5519}}^1$

素因数の和:5593

約数の個数: 24

約数和(自身を含む): 35592960

約数和(自身を除く): 14383443

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5519, 16557, 38633, 49671, 115899, 336659, 347697, 1009977, 2356613, 3029931, 7069839, 21209517]

約数ペア:

[(1, 21209517), (3, 7069839), (7, 3029931), (9, 2356613), (21, 1009977), (61, 347697), (63, 336659), (183, 115899), (427, 49671), (549, 38633), (1281, 16557), (3843, 5519)]