19967740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1259}}^1$

素因数の和:1342

約数の個数: 48

約数和(自身を含む): 45934560

約数和(自身を除く): 25966820

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1259, 1586, 2518, 3172, 3965, 5036, 6295, 7930, 12590, 15860, 16367, 25180, 32734, 65468, 76799, 81835, 153598, 163670, 307196, 327340, 383995, 767990, 998387, 1535980, 1996774, 3993548, 4991935, 9983870, 19967740]

約数ペア:

[(1, 19967740), (2, 9983870), (4, 4991935), (5, 3993548), (10, 1996774), (13, 1535980), (20, 998387), (26, 767990), (52, 383995), (61, 327340), (65, 307196), (122, 163670), (130, 153598), (244, 81835), (260, 76799), (305, 65468), (610, 32734), (793, 25180), (1220, 16367), (1259, 15860), (1586, 12590), (2518, 7930), (3172, 6295), (3965, 5036)]