21671720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11057}}^1$

素因数の和:11082

約数の個数: 48

約数和(自身を含む): 56727540

約数和(自身を除く): 35055820

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11057, 22114, 44228, 55285, 77399, 88456, 110570, 154798, 221140, 309596, 386995, 442280, 541793, 619192, 773990, 1083586, 1547980, 2167172, 2708965, 3095960, 4334344, 5417930, 10835860, 21671720]

約数ペア:

[(1, 21671720), (2, 10835860), (4, 5417930), (5, 4334344), (7, 3095960), (8, 2708965), (10, 2167172), (14, 1547980), (20, 1083586), (28, 773990), (35, 619192), (40, 541793), (49, 442280), (56, 386995), (70, 309596), (98, 221140), (140, 154798), (196, 110570), (245, 88456), (280, 77399), (392, 55285), (490, 44228), (980, 22114), (1960, 11057)]