21003216

素因数分解:

$2^4\times 3^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{347}}^1$

素因数の和:468

約数の個数: 80

約数和(自身を含む): 59204544

約数和(自身を除く): 38201328

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 16, 24, 26, 39, 48, 52, 78, 97, 104, 156, 194, 208, 291, 312, 347, 388, 582, 624, 694, 776, 1041, 1164, 1261, 1388, 1552, 2082, 2328, 2522, 2776, 3783, 4164, 4511, 4656, 5044, 5552, 7566, 8328, 9022, 10088, 13533, 15132, 16656, 18044, 20176, 27066, 30264, 33659, 36088, 54132, 60528, 67318, 72176, 100977, 108264, 134636, 201954, 216528, 269272, 403908, 437567, 538544, 807816, 875134, 1312701, 1615632, 1750268, 2625402, 3500536, 5250804, 7001072, 10501608, 21003216]

約数ペア:

[(1, 21003216), (2, 10501608), (3, 7001072), (4, 5250804), (6, 3500536), (8, 2625402), (12, 1750268), (13, 1615632), (16, 1312701), (24, 875134), (26, 807816), (39, 538544), (48, 437567), (52, 403908), (78, 269272), (97, 216528), (104, 201954), (156, 134636), (194, 108264), (208, 100977), (291, 72176), (312, 67318), (347, 60528), (388, 54132), (582, 36088), (624, 33659), (694, 30264), (776, 27066), (1041, 20176), (1164, 18044), (1261, 16656), (1388, 15132), (1552, 13533), (2082, 10088), (2328, 9022), (2522, 8328), (2776, 7566), (3783, 5552), (4164, 5044), (4511, 4656)]