21695877

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1$

素因数の和:100

約数の個数: 72

約数和(自身を含む): 40346880

約数和(自身を除く): 18651003

約数列:

[1, 3, 7, 9, 21, 23, 27, 31, 49, 63, 69, 93, 147, 161, 189, 207, 217, 279, 441, 483, 529, 621, 651, 713, 837, 1127, 1323, 1449, 1519, 1587, 1953, 2139, 3381, 3703, 4347, 4557, 4761, 4991, 5859, 6417, 10143, 11109, 13671, 14283, 14973, 16399, 19251, 25921, 30429, 33327, 34937, 41013, 44919, 49197, 77763, 99981, 104811, 114793, 134757, 147591, 233289, 314433, 344379, 442773, 699867, 803551, 943299, 1033137, 2410653, 3099411, 7231959, 21695877]

約数ペア:

[(1, 21695877), (3, 7231959), (7, 3099411), (9, 2410653), (21, 1033137), (23, 943299), (27, 803551), (31, 699867), (49, 442773), (63, 344379), (69, 314433), (93, 233289), (147, 147591), (161, 134757), (189, 114793), (207, 104811), (217, 99981), (279, 77763), (441, 49197), (483, 44919), (529, 41013), (621, 34937), (651, 33327), (713, 30429), (837, 25921), (1127, 19251), (1323, 16399), (1449, 14973), (1519, 14283), (1587, 13671), (1953, 11109), (2139, 10143), (3381, 6417), (3703, 5859), (4347, 4991), (4557, 4761)]