19980928

素因数分解:

$2^7\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{617}}^1$

素因数の和:665

約数の個数: 64

約数和(自身を含む): 45385920

約数和(自身を除く): 25404992

約数列:

[1, 2, 4, 8, 11, 16, 22, 23, 32, 44, 46, 64, 88, 92, 128, 176, 184, 253, 352, 368, 506, 617, 704, 736, 1012, 1234, 1408, 1472, 2024, 2468, 2944, 4048, 4936, 6787, 8096, 9872, 13574, 14191, 16192, 19744, 27148, 28382, 32384, 39488, 54296, 56764, 78976, 108592, 113528, 156101, 217184, 227056, 312202, 434368, 454112, 624404, 868736, 908224, 1248808, 1816448, 2497616, 4995232, 9990464, 19980928]

約数ペア:

[(1, 19980928), (2, 9990464), (4, 4995232), (8, 2497616), (11, 1816448), (16, 1248808), (22, 908224), (23, 868736), (32, 624404), (44, 454112), (46, 434368), (64, 312202), (88, 227056), (92, 217184), (128, 156101), (176, 113528), (184, 108592), (253, 78976), (352, 56764), (368, 54296), (506, 39488), (617, 32384), (704, 28382), (736, 27148), (1012, 19744), (1234, 16192), (1408, 14191), (1472, 13574), (2024, 9872), (2468, 8096), (2944, 6787), (4048, 4936)]