19972784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{733}}^1$

素因数の和:885

約数の個数: 40

約数和(自身を含む): 42049392

約数和(自身を除く): 22076608

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 131, 208, 262, 524, 733, 1048, 1466, 1703, 2096, 2932, 3406, 5864, 6812, 9529, 11728, 13624, 19058, 27248, 38116, 76232, 96023, 152464, 192046, 384092, 768184, 1248299, 1536368, 2496598, 4993196, 9986392, 19972784]

約数ペア:

[(1, 19972784), (2, 9986392), (4, 4993196), (8, 2496598), (13, 1536368), (16, 1248299), (26, 768184), (52, 384092), (104, 192046), (131, 152464), (208, 96023), (262, 76232), (524, 38116), (733, 27248), (1048, 19058), (1466, 13624), (1703, 11728), (2096, 9529), (2932, 6812), (3406, 5864)]