31521231

素因数分解:

$3^7\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:128

約数の個数: 64

約数和(自身を含む): 56678400

約数和(自身を除く): 25157169

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 71, 81, 87, 189, 203, 213, 243, 261, 497, 567, 609, 639, 729, 783, 1491, 1701, 1827, 1917, 2059, 2187, 2349, 4473, 5103, 5481, 5751, 6177, 7047, 13419, 14413, 15309, 16443, 17253, 18531, 21141, 40257, 43239, 49329, 51759, 55593, 63423, 120771, 129717, 147987, 155277, 166779, 362313, 389151, 443961, 500337, 1086939, 1167453, 1501011, 3502359, 4503033, 10507077, 31521231]

約数ペア:

[(1, 31521231), (3, 10507077), (7, 4503033), (9, 3502359), (21, 1501011), (27, 1167453), (29, 1086939), (63, 500337), (71, 443961), (81, 389151), (87, 362313), (189, 166779), (203, 155277), (213, 147987), (243, 129717), (261, 120771), (497, 63423), (567, 55593), (609, 51759), (639, 49329), (729, 43239), (783, 40257), (1491, 21141), (1701, 18531), (1827, 17253), (1917, 16443), (2059, 15309), (2187, 14413), (2349, 13419), (4473, 7047), (5103, 6177), (5481, 5751)]