19997536

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{907}}^1$

素因数の和:983

約数の個数: 48

約数和(自身を含む): 43246224

約数和(自身を除く): 23248688

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 53, 104, 106, 208, 212, 416, 424, 689, 848, 907, 1378, 1696, 1814, 2756, 3628, 5512, 7256, 11024, 11791, 14512, 22048, 23582, 29024, 47164, 48071, 94328, 96142, 188656, 192284, 377312, 384568, 624923, 769136, 1249846, 1538272, 2499692, 4999384, 9998768, 19997536]

約数ペア:

[(1, 19997536), (2, 9998768), (4, 4999384), (8, 2499692), (13, 1538272), (16, 1249846), (26, 769136), (32, 624923), (52, 384568), (53, 377312), (104, 192284), (106, 188656), (208, 96142), (212, 94328), (416, 48071), (424, 47164), (689, 29024), (848, 23582), (907, 22048), (1378, 14512), (1696, 11791), (1814, 11024), (2756, 7256), (3628, 5512)]