21511815

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1031}}^1$

素因数の和:1159

約数の個数: 32

約数和(自身を含む): 37449216

約数和(自身を除く): 15937401

約数列:

[1, 3, 5, 13, 15, 39, 65, 107, 195, 321, 535, 1031, 1391, 1605, 3093, 4173, 5155, 6955, 13403, 15465, 20865, 40209, 67015, 110317, 201045, 330951, 551585, 1434121, 1654755, 4302363, 7170605, 21511815]

約数ペア:

[(1, 21511815), (3, 7170605), (5, 4302363), (13, 1654755), (15, 1434121), (39, 551585), (65, 330951), (107, 201045), (195, 110317), (321, 67015), (535, 40209), (1031, 20865), (1391, 15465), (1605, 13403), (3093, 6955), (4173, 5155)]