21680253

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{653}}^1$

素因数の和:714

約数の個数: 48

約数和(自身を含む): 39177216

約数和(自身を除く): 17496963

約数列:

[1, 3, 7, 9, 17, 21, 31, 51, 63, 93, 119, 153, 217, 279, 357, 527, 651, 653, 1071, 1581, 1953, 1959, 3689, 4571, 4743, 5877, 11067, 11101, 13713, 20243, 33201, 33303, 41139, 60729, 77707, 99909, 141701, 182187, 233121, 344131, 425103, 699363, 1032393, 1275309, 2408917, 3097179, 7226751, 21680253]

約数ペア:

[(1, 21680253), (3, 7226751), (7, 3097179), (9, 2408917), (17, 1275309), (21, 1032393), (31, 699363), (51, 425103), (63, 344131), (93, 233121), (119, 182187), (153, 141701), (217, 99909), (279, 77707), (357, 60729), (527, 41139), (651, 33303), (653, 33201), (1071, 20243), (1581, 13713), (1953, 11101), (1959, 11067), (3689, 5877), (4571, 4743)]