20807696

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{461}}^1$

素因数の和:520

約数の個数: 80

約数和(自身を含む): 51330048

約数和(自身を除く): 30522352

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 31, 52, 56, 62, 91, 104, 112, 124, 182, 208, 217, 248, 364, 403, 434, 461, 496, 728, 806, 868, 922, 1456, 1612, 1736, 1844, 2821, 3224, 3227, 3472, 3688, 5642, 5993, 6448, 6454, 7376, 11284, 11986, 12908, 14291, 22568, 23972, 25816, 28582, 41951, 45136, 47944, 51632, 57164, 83902, 95888, 100037, 114328, 167804, 185783, 200074, 228656, 335608, 371566, 400148, 671216, 743132, 800296, 1300481, 1486264, 1600592, 2600962, 2972528, 5201924, 10403848, 20807696]

約数ペア:

[(1, 20807696), (2, 10403848), (4, 5201924), (7, 2972528), (8, 2600962), (13, 1600592), (14, 1486264), (16, 1300481), (26, 800296), (28, 743132), (31, 671216), (52, 400148), (56, 371566), (62, 335608), (91, 228656), (104, 200074), (112, 185783), (124, 167804), (182, 114328), (208, 100037), (217, 95888), (248, 83902), (364, 57164), (403, 51632), (434, 47944), (461, 45136), (496, 41951), (728, 28582), (806, 25816), (868, 23972), (922, 22568), (1456, 14291), (1612, 12908), (1736, 11986), (1844, 11284), (2821, 7376), (3224, 6454), (3227, 6448), (3472, 5993), (3688, 5642)]