20489994

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1187}}^1$

素因数の和:1339

約数の個数: 48

約数和(自身を含む): 51150528

約数和(自身を除く): 30660534

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 137, 274, 411, 822, 959, 1187, 1233, 1918, 2374, 2466, 2877, 3561, 5754, 7122, 8309, 8631, 10683, 16618, 17262, 21366, 24927, 49854, 74781, 149562, 162619, 325238, 487857, 975714, 1138333, 1463571, 2276666, 2927142, 3414999, 6829998, 10244997, 20489994]

約数ペア:

[(1, 20489994), (2, 10244997), (3, 6829998), (6, 3414999), (7, 2927142), (9, 2276666), (14, 1463571), (18, 1138333), (21, 975714), (42, 487857), (63, 325238), (126, 162619), (137, 149562), (274, 74781), (411, 49854), (822, 24927), (959, 21366), (1187, 17262), (1233, 16618), (1918, 10683), (2374, 8631), (2466, 8309), (2877, 7122), (3561, 5754)]