21857745

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{239}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 43868160

約数和(自身を除く): 22010415

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 67, 91, 105, 195, 201, 239, 273, 335, 455, 469, 717, 871, 1005, 1195, 1365, 1407, 1673, 2345, 2613, 3107, 3585, 4355, 5019, 6097, 7035, 8365, 9321, 13065, 15535, 16013, 18291, 21749, 25095, 30485, 46605, 48039, 65247, 80065, 91455, 108745, 112091, 208169, 240195, 326235, 336273, 560455, 624507, 1040845, 1457183, 1681365, 3122535, 4371549, 7285915, 21857745]

約数ペア:

[(1, 21857745), (3, 7285915), (5, 4371549), (7, 3122535), (13, 1681365), (15, 1457183), (21, 1040845), (35, 624507), (39, 560455), (65, 336273), (67, 326235), (91, 240195), (105, 208169), (195, 112091), (201, 108745), (239, 91455), (273, 80065), (335, 65247), (455, 48039), (469, 46605), (717, 30485), (871, 25095), (1005, 21749), (1195, 18291), (1365, 16013), (1407, 15535), (1673, 13065), (2345, 9321), (2613, 8365), (3107, 7035), (3585, 6097), (4355, 5019)]