21421911

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{1013}}^1$

素因数の和:1095

約数の個数: 32

約数和(自身を含む): 35043840

約数和(自身を除く): 13621929

約数列:

[1, 3, 7, 19, 21, 53, 57, 133, 159, 371, 399, 1007, 1013, 1113, 3021, 3039, 7049, 7091, 19247, 21147, 21273, 53689, 57741, 134729, 161067, 375823, 404187, 1020091, 1127469, 3060273, 7140637, 21421911]

約数ペア:

[(1, 21421911), (3, 7140637), (7, 3060273), (19, 1127469), (21, 1020091), (53, 404187), (57, 375823), (133, 161067), (159, 134729), (371, 57741), (399, 53689), (1007, 21273), (1013, 21147), (1113, 19247), (3021, 7091), (3039, 7049)]