21400365

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{631}}^1$

素因数の和:682

約数の個数: 64

約数和(自身を含む): 43683840

約数和(自身を除く): 22283475

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 399, 595, 631, 665, 969, 1615, 1785, 1893, 1995, 2261, 3155, 4417, 4845, 6783, 9465, 10727, 11305, 11989, 13251, 22085, 32181, 33915, 35967, 53635, 59945, 66255, 75089, 83923, 160905, 179835, 203813, 225267, 251769, 375445, 419615, 611439, 1019065, 1126335, 1258845, 1426691, 3057195, 4280073, 7133455, 21400365]

約数ペア:

[(1, 21400365), (3, 7133455), (5, 4280073), (7, 3057195), (15, 1426691), (17, 1258845), (19, 1126335), (21, 1019065), (35, 611439), (51, 419615), (57, 375445), (85, 251769), (95, 225267), (105, 203813), (119, 179835), (133, 160905), (255, 83923), (285, 75089), (323, 66255), (357, 59945), (399, 53635), (595, 35967), (631, 33915), (665, 32181), (969, 22085), (1615, 13251), (1785, 11989), (1893, 11305), (1995, 10727), (2261, 9465), (3155, 6783), (4417, 4845)]