21819520

素因数分解:

$2^7\times 5^1\times {\mathrm{103}}^1\times {\mathrm{331}}^1$

素因数の和:453

約数の個数: 64

約数和(自身を含む): 52827840

約数和(自身を除く): 31008320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 128, 160, 206, 320, 331, 412, 515, 640, 662, 824, 1030, 1324, 1648, 1655, 2060, 2648, 3296, 3310, 4120, 5296, 6592, 6620, 8240, 10592, 13184, 13240, 16480, 21184, 26480, 32960, 34093, 42368, 52960, 65920, 68186, 105920, 136372, 170465, 211840, 272744, 340930, 545488, 681860, 1090976, 1363720, 2181952, 2727440, 4363904, 5454880, 10909760, 21819520]

約数ペア:

[(1, 21819520), (2, 10909760), (4, 5454880), (5, 4363904), (8, 2727440), (10, 2181952), (16, 1363720), (20, 1090976), (32, 681860), (40, 545488), (64, 340930), (80, 272744), (103, 211840), (128, 170465), (160, 136372), (206, 105920), (320, 68186), (331, 65920), (412, 52960), (515, 42368), (640, 34093), (662, 32960), (824, 26480), (1030, 21184), (1324, 16480), (1648, 13240), (1655, 13184), (2060, 10592), (2648, 8240), (3296, 6620), (3310, 6592), (4120, 5296)]