21275778880

素因数分解:

$2^6\times 5^1\times {\mathrm{103}}^1\times {\mathrm{645503}}^1$

素因数の和:645623

約数の個数: 56

約数和(自身を含む): 51154900992

約数和(自身を除く): 29879122112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 103, 160, 206, 320, 412, 515, 824, 1030, 1648, 2060, 3296, 4120, 6592, 8240, 16480, 32960, 645503, 1291006, 2582012, 3227515, 5164024, 6455030, 10328048, 12910060, 20656096, 25820120, 41312192, 51640240, 66486809, 103280480, 132973618, 206560960, 265947236, 332434045, 531894472, 664868090, 1063788944, 1329736180, 2127577888, 2659472360, 4255155776, 5318944720, 10637889440, 21275778880]

約数ペア:

[(1, 21275778880), (2, 10637889440), (4, 5318944720), (5, 4255155776), (8, 2659472360), (10, 2127577888), (16, 1329736180), (20, 1063788944), (32, 664868090), (40, 531894472), (64, 332434045), (80, 265947236), (103, 206560960), (160, 132973618), (206, 103280480), (320, 66486809), (412, 51640240), (515, 41312192), (824, 25820120), (1030, 20656096), (1648, 12910060), (2060, 10328048), (3296, 6455030), (4120, 5164024), (6592, 3227515), (8240, 2582012), (16480, 1291006), (32960, 645503)]