21788247

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{127}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 10725801

約数列:

[1, 3, 13, 39, 53, 83, 127, 159, 249, 381, 689, 1079, 1651, 2067, 3237, 4399, 4953, 6731, 10541, 13197, 20193, 31623, 57187, 87503, 137033, 171561, 262509, 411099, 558673, 1676019, 7262749, 21788247]

約数ペア:

[(1, 21788247), (3, 7262749), (13, 1676019), (39, 558673), (53, 411099), (83, 262509), (127, 171561), (159, 137033), (249, 87503), (381, 57187), (689, 31623), (1079, 20193), (1651, 13197), (2067, 10541), (3237, 6731), (4399, 4953)]