21081280

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{113}}^1$

素因数の和:194

約数の個数: 112

約数和(自身を含む): 56290464

約数和(自身を除く): 35209184

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 53, 55, 64, 80, 88, 106, 110, 113, 160, 176, 212, 220, 226, 265, 320, 352, 424, 440, 452, 530, 565, 583, 704, 848, 880, 904, 1060, 1130, 1166, 1243, 1696, 1760, 1808, 2120, 2260, 2332, 2486, 2915, 3392, 3520, 3616, 4240, 4520, 4664, 4972, 5830, 5989, 6215, 7232, 8480, 9040, 9328, 9944, 11660, 11978, 12430, 16960, 18080, 18656, 19888, 23320, 23956, 24860, 29945, 36160, 37312, 39776, 46640, 47912, 49720, 59890, 65879, 79552, 93280, 95824, 99440, 119780, 131758, 186560, 191648, 198880, 239560, 263516, 329395, 383296, 397760, 479120, 527032, 658790, 958240, 1054064, 1317580, 1916480, 2108128, 2635160, 4216256, 5270320, 10540640, 21081280]

約数ペア:

[(1, 21081280), (2, 10540640), (4, 5270320), (5, 4216256), (8, 2635160), (10, 2108128), (11, 1916480), (16, 1317580), (20, 1054064), (22, 958240), (32, 658790), (40, 527032), (44, 479120), (53, 397760), (55, 383296), (64, 329395), (80, 263516), (88, 239560), (106, 198880), (110, 191648), (113, 186560), (160, 131758), (176, 119780), (212, 99440), (220, 95824), (226, 93280), (265, 79552), (320, 65879), (352, 59890), (424, 49720), (440, 47912), (452, 46640), (530, 39776), (565, 37312), (583, 36160), (704, 29945), (848, 24860), (880, 23956), (904, 23320), (1060, 19888), (1130, 18656), (1166, 18080), (1243, 16960), (1696, 12430), (1760, 11978), (1808, 11660), (2120, 9944), (2260, 9328), (2332, 9040), (2486, 8480), (2915, 7232), (3392, 6215), (3520, 5989), (3616, 5830), (4240, 4972), (4520, 4664)]