18680451993

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{179}}^1\times {\mathrm{239}}^2$

素因数の和:699

約数の個数: 72

約数和(自身を含む): 32213937600

約数和(自身を除く): 13533485607

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 179, 203, 239, 261, 537, 609, 717, 1253, 1611, 1673, 1827, 2151, 3759, 5019, 5191, 6931, 11277, 15057, 15573, 20793, 36337, 42781, 46719, 48517, 57121, 62379, 109011, 128343, 145551, 171363, 299467, 327033, 385029, 399847, 436653, 514089, 898401, 1199541, 1240649, 1656509, 2695203, 3598623, 3721947, 4969527, 8684543, 10224659, 11165841, 11595563, 14908581, 26053629, 30673977, 34786689, 71572613, 78160887, 92021931, 104360067, 214717839, 296515111, 644153517, 889545333, 2075605777, 2668635999, 6226817331, 18680451993]

約数ペア:

[(1, 18680451993), (3, 6226817331), (7, 2668635999), (9, 2075605777), (21, 889545333), (29, 644153517), (63, 296515111), (87, 214717839), (179, 104360067), (203, 92021931), (239, 78160887), (261, 71572613), (537, 34786689), (609, 30673977), (717, 26053629), (1253, 14908581), (1611, 11595563), (1673, 11165841), (1827, 10224659), (2151, 8684543), (3759, 4969527), (5019, 3721947), (5191, 3598623), (6931, 2695203), (11277, 1656509), (15057, 1240649), (15573, 1199541), (20793, 898401), (36337, 514089), (42781, 436653), (46719, 399847), (48517, 385029), (57121, 327033), (62379, 299467), (109011, 171363), (128343, 145551)]