21117978

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{9859}}^1$

素因数の和:9891

約数の個数: 48

約数和(自身を含む): 55373760

約数和(自身を除く): 34255782

約数列:

[1, 2, 3, 6, 7, 9, 14, 17, 18, 21, 34, 42, 51, 63, 102, 119, 126, 153, 238, 306, 357, 714, 1071, 2142, 9859, 19718, 29577, 59154, 69013, 88731, 138026, 167603, 177462, 207039, 335206, 414078, 502809, 621117, 1005618, 1173221, 1242234, 1508427, 2346442, 3016854, 3519663, 7039326, 10558989, 21117978]

約数ペア:

[(1, 21117978), (2, 10558989), (3, 7039326), (6, 3519663), (7, 3016854), (9, 2346442), (14, 1508427), (17, 1242234), (18, 1173221), (21, 1005618), (34, 621117), (42, 502809), (51, 414078), (63, 335206), (102, 207039), (119, 177462), (126, 167603), (153, 138026), (238, 88731), (306, 69013), (357, 59154), (714, 29577), (1071, 19718), (2142, 9859)]