21860720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{379}}^1$

素因数の和:502

約数の個数: 80

約数和(自身を含む): 58805760

約数和(自身を除く): 36945040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 103, 112, 140, 206, 280, 379, 412, 515, 560, 721, 758, 824, 1030, 1442, 1516, 1648, 1895, 2060, 2653, 2884, 3032, 3605, 3790, 4120, 5306, 5768, 6064, 7210, 7580, 8240, 10612, 11536, 13265, 14420, 15160, 21224, 26530, 28840, 30320, 39037, 42448, 53060, 57680, 78074, 106120, 156148, 195185, 212240, 273259, 312296, 390370, 546518, 624592, 780740, 1093036, 1366295, 1561480, 2186072, 2732590, 3122960, 4372144, 5465180, 10930360, 21860720]

約数ペア:

[(1, 21860720), (2, 10930360), (4, 5465180), (5, 4372144), (7, 3122960), (8, 2732590), (10, 2186072), (14, 1561480), (16, 1366295), (20, 1093036), (28, 780740), (35, 624592), (40, 546518), (56, 390370), (70, 312296), (80, 273259), (103, 212240), (112, 195185), (140, 156148), (206, 106120), (280, 78074), (379, 57680), (412, 53060), (515, 42448), (560, 39037), (721, 30320), (758, 28840), (824, 26530), (1030, 21224), (1442, 15160), (1516, 14420), (1648, 13265), (1895, 11536), (2060, 10612), (2653, 8240), (2884, 7580), (3032, 7210), (3605, 6064), (3790, 5768), (4120, 5306)]