21713120

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1$

素因数の和:125

約数の個数: 144

約数和(自身を含む): 61426512

約数和(自身を除く): 39713392

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 65, 73, 80, 88, 104, 110, 130, 143, 146, 160, 169, 176, 208, 220, 260, 286, 292, 338, 352, 365, 416, 440, 520, 572, 584, 676, 715, 730, 803, 845, 880, 949, 1040, 1144, 1168, 1352, 1430, 1460, 1606, 1690, 1760, 1859, 1898, 2080, 2288, 2336, 2704, 2860, 2920, 3212, 3380, 3718, 3796, 4015, 4576, 4745, 5408, 5720, 5840, 6424, 6760, 7436, 7592, 8030, 9295, 9490, 10439, 11440, 11680, 12337, 12848, 13520, 14872, 15184, 16060, 18590, 18980, 20878, 22880, 24674, 25696, 27040, 29744, 30368, 32120, 37180, 37960, 41756, 49348, 52195, 59488, 61685, 64240, 74360, 75920, 83512, 98696, 104390, 123370, 128480, 135707, 148720, 151840, 167024, 197392, 208780, 246740, 271414, 297440, 334048, 394784, 417560, 493480, 542828, 678535, 835120, 986960, 1085656, 1357070, 1670240, 1973920, 2171312, 2714140, 4342624, 5428280, 10856560, 21713120]

約数ペア:

[(1, 21713120), (2, 10856560), (4, 5428280), (5, 4342624), (8, 2714140), (10, 2171312), (11, 1973920), (13, 1670240), (16, 1357070), (20, 1085656), (22, 986960), (26, 835120), (32, 678535), (40, 542828), (44, 493480), (52, 417560), (55, 394784), (65, 334048), (73, 297440), (80, 271414), (88, 246740), (104, 208780), (110, 197392), (130, 167024), (143, 151840), (146, 148720), (160, 135707), (169, 128480), (176, 123370), (208, 104390), (220, 98696), (260, 83512), (286, 75920), (292, 74360), (338, 64240), (352, 61685), (365, 59488), (416, 52195), (440, 49348), (520, 41756), (572, 37960), (584, 37180), (676, 32120), (715, 30368), (730, 29744), (803, 27040), (845, 25696), (880, 24674), (949, 22880), (1040, 20878), (1144, 18980), (1168, 18590), (1352, 16060), (1430, 15184), (1460, 14872), (1606, 13520), (1690, 12848), (1760, 12337), (1859, 11680), (1898, 11440), (2080, 10439), (2288, 9490), (2336, 9295), (2704, 8030), (2860, 7592), (2920, 7436), (3212, 6760), (3380, 6424), (3718, 5840), (3796, 5720), (4015, 5408), (4576, 4745)]