21389896

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{1163}}^1$

素因数の和:1210

約数の個数: 48

約数和(自身を含む): 46443600

約数和(自身を除く): 25053704

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 76, 88, 121, 152, 209, 242, 418, 484, 836, 968, 1163, 1672, 2299, 2326, 4598, 4652, 9196, 9304, 12793, 18392, 22097, 25586, 44194, 51172, 88388, 102344, 140723, 176776, 243067, 281446, 486134, 562892, 972268, 1125784, 1944536, 2673737, 5347474, 10694948, 21389896]

約数ペア:

[(1, 21389896), (2, 10694948), (4, 5347474), (8, 2673737), (11, 1944536), (19, 1125784), (22, 972268), (38, 562892), (44, 486134), (76, 281446), (88, 243067), (121, 176776), (152, 140723), (209, 102344), (242, 88388), (418, 51172), (484, 44194), (836, 25586), (968, 22097), (1163, 18392), (1672, 12793), (2299, 9304), (2326, 9196), (4598, 4652)]