21498710

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{173}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 42307056

約数和(自身を除く): 20808346

約数列:

[1, 2, 5, 10, 17, 34, 43, 85, 86, 170, 173, 215, 289, 346, 430, 578, 731, 865, 1445, 1462, 1730, 2890, 2941, 3655, 5882, 7310, 7439, 12427, 14705, 14878, 24854, 29410, 37195, 49997, 62135, 74390, 99994, 124270, 126463, 249985, 252926, 499970, 632315, 1264630, 2149871, 4299742, 10749355, 21498710]

約数ペア:

[(1, 21498710), (2, 10749355), (5, 4299742), (10, 2149871), (17, 1264630), (34, 632315), (43, 499970), (85, 252926), (86, 249985), (170, 126463), (173, 124270), (215, 99994), (289, 74390), (346, 62135), (430, 49997), (578, 37195), (731, 29410), (865, 24854), (1445, 14878), (1462, 14705), (1730, 12427), (2890, 7439), (2941, 7310), (3655, 5882)]