19513744

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{251}}^1$

素因数の和:415

約数の個数: 40

約数和(自身を含む): 39184992

約数和(自身を除く): 19671248

約数列:

[1, 2, 4, 8, 16, 43, 86, 113, 172, 226, 251, 344, 452, 502, 688, 904, 1004, 1808, 2008, 4016, 4859, 9718, 10793, 19436, 21586, 28363, 38872, 43172, 56726, 77744, 86344, 113452, 172688, 226904, 453808, 1219609, 2439218, 4878436, 9756872, 19513744]

約数ペア:

[(1, 19513744), (2, 9756872), (4, 4878436), (8, 2439218), (16, 1219609), (43, 453808), (86, 226904), (113, 172688), (172, 113452), (226, 86344), (251, 77744), (344, 56726), (452, 43172), (502, 38872), (688, 28363), (904, 21586), (1004, 19436), (1808, 10793), (2008, 9718), (4016, 4859)]