21325120

素因数分解:

$2^6\times 5^1\times {\mathrm{103}}^1\times {\mathrm{647}}^1$

素因数の和:767

約数の個数: 56

約数和(自身を含む): 51352704

約数和(自身を除く): 30027584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 160, 206, 320, 412, 515, 647, 824, 1030, 1294, 1648, 2060, 2588, 3235, 3296, 4120, 5176, 6470, 6592, 8240, 10352, 12940, 16480, 20704, 25880, 32960, 41408, 51760, 66641, 103520, 133282, 207040, 266564, 333205, 533128, 666410, 1066256, 1332820, 2132512, 2665640, 4265024, 5331280, 10662560, 21325120]

約数ペア:

[(1, 21325120), (2, 10662560), (4, 5331280), (5, 4265024), (8, 2665640), (10, 2132512), (16, 1332820), (20, 1066256), (32, 666410), (40, 533128), (64, 333205), (80, 266564), (103, 207040), (160, 133282), (206, 103520), (320, 66641), (412, 51760), (515, 41408), (647, 32960), (824, 25880), (1030, 20704), (1294, 16480), (1648, 12940), (2060, 10352), (2588, 8240), (3235, 6592), (3296, 6470), (4120, 5176)]