81017920

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{281}}^1$

素因数の和:368

約数の個数: 112

約数和(自身を含む): 208867248

約数和(自身を除く): 127849328

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 53, 64, 68, 80, 85, 106, 136, 160, 170, 212, 265, 272, 281, 320, 340, 424, 530, 544, 562, 680, 848, 901, 1060, 1088, 1124, 1360, 1405, 1696, 1802, 2120, 2248, 2720, 2810, 3392, 3604, 4240, 4496, 4505, 4777, 5440, 5620, 7208, 8480, 8992, 9010, 9554, 11240, 14416, 14893, 16960, 17984, 18020, 19108, 22480, 23885, 28832, 29786, 36040, 38216, 44960, 47770, 57664, 59572, 72080, 74465, 76432, 89920, 95540, 119144, 144160, 148930, 152864, 191080, 238288, 253181, 288320, 297860, 305728, 382160, 476576, 506362, 595720, 764320, 953152, 1012724, 1191440, 1265905, 1528640, 2025448, 2382880, 2531810, 4050896, 4765760, 5063620, 8101792, 10127240, 16203584, 20254480, 40508960, 81017920]

約数ペア:

[(1, 81017920), (2, 40508960), (4, 20254480), (5, 16203584), (8, 10127240), (10, 8101792), (16, 5063620), (17, 4765760), (20, 4050896), (32, 2531810), (34, 2382880), (40, 2025448), (53, 1528640), (64, 1265905), (68, 1191440), (80, 1012724), (85, 953152), (106, 764320), (136, 595720), (160, 506362), (170, 476576), (212, 382160), (265, 305728), (272, 297860), (281, 288320), (320, 253181), (340, 238288), (424, 191080), (530, 152864), (544, 148930), (562, 144160), (680, 119144), (848, 95540), (901, 89920), (1060, 76432), (1088, 74465), (1124, 72080), (1360, 59572), (1405, 57664), (1696, 47770), (1802, 44960), (2120, 38216), (2248, 36040), (2720, 29786), (2810, 28832), (3392, 23885), (3604, 22480), (4240, 19108), (4496, 18020), (4505, 17984), (4777, 16960), (5440, 14893), (5620, 14416), (7208, 11240), (8480, 9554), (8992, 9010)]