20049920

素因数分解:

$2^{12}\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1$

素因数の和:129

約数の個数: 104

約数和(自身を含む): 53077680

約数和(自身を除く): 33027760

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 89, 110, 128, 160, 176, 178, 220, 256, 320, 352, 356, 440, 445, 512, 640, 704, 712, 880, 890, 979, 1024, 1280, 1408, 1424, 1760, 1780, 1958, 2048, 2560, 2816, 2848, 3520, 3560, 3916, 4096, 4895, 5120, 5632, 5696, 7040, 7120, 7832, 9790, 10240, 11264, 11392, 14080, 14240, 15664, 19580, 20480, 22528, 22784, 28160, 28480, 31328, 39160, 45056, 45568, 56320, 56960, 62656, 78320, 91136, 112640, 113920, 125312, 156640, 182272, 225280, 227840, 250624, 313280, 364544, 455680, 501248, 626560, 911360, 1002496, 1253120, 1822720, 2004992, 2506240, 4009984, 5012480, 10024960, 20049920]

約数ペア:

[(1, 20049920), (2, 10024960), (4, 5012480), (5, 4009984), (8, 2506240), (10, 2004992), (11, 1822720), (16, 1253120), (20, 1002496), (22, 911360), (32, 626560), (40, 501248), (44, 455680), (55, 364544), (64, 313280), (80, 250624), (88, 227840), (89, 225280), (110, 182272), (128, 156640), (160, 125312), (176, 113920), (178, 112640), (220, 91136), (256, 78320), (320, 62656), (352, 56960), (356, 56320), (440, 45568), (445, 45056), (512, 39160), (640, 31328), (704, 28480), (712, 28160), (880, 22784), (890, 22528), (979, 20480), (1024, 19580), (1280, 15664), (1408, 14240), (1424, 14080), (1760, 11392), (1780, 11264), (1958, 10240), (2048, 9790), (2560, 7832), (2816, 7120), (2848, 7040), (3520, 5696), (3560, 5632), (3916, 5120), (4096, 4895)]