20121479973

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71983}}^1$

素因数の和:72048

約数の個数: 80

約数和(自身を含む): 37627476480

約数和(自身を除く): 17505996507

約数列:

[1, 3, 7, 9, 17, 21, 27, 29, 51, 63, 81, 87, 119, 153, 189, 203, 261, 357, 459, 493, 567, 609, 783, 1071, 1377, 1479, 1827, 2349, 3213, 3451, 4437, 5481, 9639, 10353, 13311, 16443, 31059, 39933, 71983, 93177, 215949, 279531, 503881, 647847, 1223711, 1511643, 1943541, 2087507, 3671133, 4534929, 5830623, 6262521, 8565977, 11013399, 13604787, 14612549, 18787563, 25697931, 33040197, 35487619, 40814361, 43837647, 56362689, 77093793, 99120591, 106462857, 131512941, 169088067, 231281379, 248413333, 319388571, 394538823, 693844137, 745239999, 958165713, 1183616469, 2235719997, 2874497139, 6707159991, 20121479973]

約数ペア:

[(1, 20121479973), (3, 6707159991), (7, 2874497139), (9, 2235719997), (17, 1183616469), (21, 958165713), (27, 745239999), (29, 693844137), (51, 394538823), (63, 319388571), (81, 248413333), (87, 231281379), (119, 169088067), (153, 131512941), (189, 106462857), (203, 99120591), (261, 77093793), (357, 56362689), (459, 43837647), (493, 40814361), (567, 35487619), (609, 33040197), (783, 25697931), (1071, 18787563), (1377, 14612549), (1479, 13604787), (1827, 11013399), (2349, 8565977), (3213, 6262521), (3451, 5830623), (4437, 4534929), (5481, 3671133), (9639, 2087507), (10353, 1943541), (13311, 1511643), (16443, 1223711), (31059, 647847), (39933, 503881), (71983, 279531), (93177, 215949)]