19913920

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{4787}}^1$

素因数の和:4817

約数の個数: 56

約数和(自身を含む): 51078384

約数和(自身を除く): 31164464

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 208, 260, 320, 416, 520, 832, 1040, 2080, 4160, 4787, 9574, 19148, 23935, 38296, 47870, 62231, 76592, 95740, 124462, 153184, 191480, 248924, 306368, 311155, 382960, 497848, 622310, 765920, 995696, 1244620, 1531840, 1991392, 2489240, 3982784, 4978480, 9956960, 19913920]

約数ペア:

[(1, 19913920), (2, 9956960), (4, 4978480), (5, 3982784), (8, 2489240), (10, 1991392), (13, 1531840), (16, 1244620), (20, 995696), (26, 765920), (32, 622310), (40, 497848), (52, 382960), (64, 311155), (65, 306368), (80, 248924), (104, 191480), (130, 153184), (160, 124462), (208, 95740), (260, 76592), (320, 62231), (416, 47870), (520, 38296), (832, 23935), (1040, 19148), (2080, 9574), (4160, 4787)]