21689703

素因数分解:

$3^2\times 7^2\times {\mathrm{137}}^1\times {\mathrm{359}}^1$

素因数の和:516

約数の個数: 36

約数和(自身を含む): 36812880

約数和(自身を除く): 15123177

約数列:

[1, 3, 7, 9, 21, 49, 63, 137, 147, 359, 411, 441, 959, 1077, 1233, 2513, 2877, 3231, 6713, 7539, 8631, 17591, 20139, 22617, 49183, 52773, 60417, 147549, 158319, 344281, 442647, 1032843, 2409967, 3098529, 7229901, 21689703]

約数ペア:

[(1, 21689703), (3, 7229901), (7, 3098529), (9, 2409967), (21, 1032843), (49, 442647), (63, 344281), (137, 158319), (147, 147549), (359, 60417), (411, 52773), (441, 49183), (959, 22617), (1077, 20139), (1233, 17591), (2513, 8631), (2877, 7539), (3231, 6713)]