639442827

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 970444800

約数和(自身を除く): 331001973

約数列:

[1, 3, 9, 53, 71, 79, 159, 213, 237, 239, 477, 639, 711, 717, 2151, 3763, 4187, 5609, 11289, 12561, 12667, 16827, 16969, 18881, 33867, 37683, 38001, 50481, 50907, 56643, 114003, 152721, 169929, 297277, 891831, 899357, 1000693, 1340551, 2675493, 2698071, 3002079, 4021653, 8094213, 9006237, 12064959, 71049203, 213147609, 639442827]

約数ペア:

[(1, 639442827), (3, 213147609), (9, 71049203), (53, 12064959), (71, 9006237), (79, 8094213), (159, 4021653), (213, 3002079), (237, 2698071), (239, 2675493), (477, 1340551), (639, 1000693), (711, 899357), (717, 891831), (2151, 297277), (3763, 169929), (4187, 152721), (5609, 114003), (11289, 56643), (12561, 50907), (12667, 50481), (16827, 38001), (16969, 37683), (18881, 33867)]