20830720

素因数分解:

$2^9\times 5^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:205

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 30237440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 103, 128, 158, 160, 206, 256, 316, 320, 395, 412, 512, 515, 632, 640, 790, 824, 1030, 1264, 1280, 1580, 1648, 2060, 2528, 2560, 3160, 3296, 4120, 5056, 6320, 6592, 8137, 8240, 10112, 12640, 13184, 16274, 16480, 20224, 25280, 26368, 32548, 32960, 40448, 40685, 50560, 52736, 65096, 65920, 81370, 101120, 130192, 131840, 162740, 202240, 260384, 263680, 325480, 520768, 650960, 1041536, 1301920, 2083072, 2603840, 4166144, 5207680, 10415360, 20830720]

約数ペア:

[(1, 20830720), (2, 10415360), (4, 5207680), (5, 4166144), (8, 2603840), (10, 2083072), (16, 1301920), (20, 1041536), (32, 650960), (40, 520768), (64, 325480), (79, 263680), (80, 260384), (103, 202240), (128, 162740), (158, 131840), (160, 130192), (206, 101120), (256, 81370), (316, 65920), (320, 65096), (395, 52736), (412, 50560), (512, 40685), (515, 40448), (632, 32960), (640, 32548), (790, 26368), (824, 25280), (1030, 20224), (1264, 16480), (1280, 16274), (1580, 13184), (1648, 12640), (2060, 10112), (2528, 8240), (2560, 8137), (3160, 6592), (3296, 6320), (4120, 5056)]