20989760

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:184

約数の個数: 112

約数和(自身を含む): 55961280

約数和(自身を除く): 34971520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 67, 80, 88, 89, 110, 134, 160, 176, 178, 220, 268, 320, 335, 352, 356, 440, 445, 536, 670, 704, 712, 737, 880, 890, 979, 1072, 1340, 1424, 1474, 1760, 1780, 1958, 2144, 2680, 2848, 2948, 3520, 3560, 3685, 3916, 4288, 4895, 5360, 5696, 5896, 5963, 7120, 7370, 7832, 9790, 10720, 11792, 11926, 14240, 14740, 15664, 19580, 21440, 23584, 23852, 28480, 29480, 29815, 31328, 39160, 47168, 47704, 58960, 59630, 62656, 65593, 78320, 95408, 117920, 119260, 131186, 156640, 190816, 235840, 238520, 262372, 313280, 327965, 381632, 477040, 524744, 655930, 954080, 1049488, 1311860, 1908160, 2098976, 2623720, 4197952, 5247440, 10494880, 20989760]

約数ペア:

[(1, 20989760), (2, 10494880), (4, 5247440), (5, 4197952), (8, 2623720), (10, 2098976), (11, 1908160), (16, 1311860), (20, 1049488), (22, 954080), (32, 655930), (40, 524744), (44, 477040), (55, 381632), (64, 327965), (67, 313280), (80, 262372), (88, 238520), (89, 235840), (110, 190816), (134, 156640), (160, 131186), (176, 119260), (178, 117920), (220, 95408), (268, 78320), (320, 65593), (335, 62656), (352, 59630), (356, 58960), (440, 47704), (445, 47168), (536, 39160), (670, 31328), (704, 29815), (712, 29480), (737, 28480), (880, 23852), (890, 23584), (979, 21440), (1072, 19580), (1340, 15664), (1424, 14740), (1474, 14240), (1760, 11926), (1780, 11792), (1958, 10720), (2144, 9790), (2680, 7832), (2848, 7370), (2948, 7120), (3520, 5963), (3560, 5896), (3685, 5696), (3916, 5360), (4288, 4895)]