21459020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{947}}^1$

素因数の和:1070

約数の個数: 48

約数和(自身を含む): 49690368

約数和(自身を除く): 28231348

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 103, 110, 206, 220, 412, 515, 947, 1030, 1133, 1894, 2060, 2266, 3788, 4532, 4735, 5665, 9470, 10417, 11330, 18940, 20834, 22660, 41668, 52085, 97541, 104170, 195082, 208340, 390164, 487705, 975410, 1072951, 1950820, 2145902, 4291804, 5364755, 10729510, 21459020]

約数ペア:

[(1, 21459020), (2, 10729510), (4, 5364755), (5, 4291804), (10, 2145902), (11, 1950820), (20, 1072951), (22, 975410), (44, 487705), (55, 390164), (103, 208340), (110, 195082), (206, 104170), (220, 97541), (412, 52085), (515, 41668), (947, 22660), (1030, 20834), (1133, 18940), (1894, 11330), (2060, 10417), (2266, 9470), (3788, 5665), (4532, 4735)]