21213820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{431}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 47029248

約数和(自身を除く): 25815428

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 107, 115, 214, 230, 428, 431, 460, 535, 862, 1070, 1724, 2140, 2155, 2461, 4310, 4922, 8620, 9844, 9913, 12305, 19826, 24610, 39652, 46117, 49220, 49565, 92234, 99130, 184468, 198260, 230585, 461170, 922340, 1060691, 2121382, 4242764, 5303455, 10606910, 21213820]

約数ペア:

[(1, 21213820), (2, 10606910), (4, 5303455), (5, 4242764), (10, 2121382), (20, 1060691), (23, 922340), (46, 461170), (92, 230585), (107, 198260), (115, 184468), (214, 99130), (230, 92234), (428, 49565), (431, 49220), (460, 46117), (535, 39652), (862, 24610), (1070, 19826), (1724, 12305), (2140, 9913), (2155, 9844), (2461, 8620), (4310, 4922)]