20684240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{227}}^1$

素因数の和:324

約数の個数: 80

約数和(自身を含む): 51907392

約数和(自身を除く): 31223152

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 67, 68, 80, 85, 134, 136, 170, 227, 268, 272, 335, 340, 454, 536, 670, 680, 908, 1072, 1135, 1139, 1340, 1360, 1816, 2270, 2278, 2680, 3632, 3859, 4540, 4556, 5360, 5695, 7718, 9080, 9112, 11390, 15209, 15436, 18160, 18224, 19295, 22780, 30418, 30872, 38590, 45560, 60836, 61744, 76045, 77180, 91120, 121672, 152090, 154360, 243344, 258553, 304180, 308720, 517106, 608360, 1034212, 1216720, 1292765, 2068424, 2585530, 4136848, 5171060, 10342120, 20684240]

約数ペア:

[(1, 20684240), (2, 10342120), (4, 5171060), (5, 4136848), (8, 2585530), (10, 2068424), (16, 1292765), (17, 1216720), (20, 1034212), (34, 608360), (40, 517106), (67, 308720), (68, 304180), (80, 258553), (85, 243344), (134, 154360), (136, 152090), (170, 121672), (227, 91120), (268, 77180), (272, 76045), (335, 61744), (340, 60836), (454, 45560), (536, 38590), (670, 30872), (680, 30418), (908, 22780), (1072, 19295), (1135, 18224), (1139, 18160), (1340, 15436), (1360, 15209), (1816, 11390), (2270, 9112), (2278, 9080), (2680, 7718), (3632, 5695), (3859, 5360), (4540, 4556)]