19781356

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^3\times {\mathrm{103}}^1$

素因数の和:171

約数の個数: 48

約数和(自身を含む): 42165760

約数和(自身を除く): 22384404

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 103, 133, 206, 266, 361, 412, 532, 721, 722, 1442, 1444, 1957, 2527, 2884, 3914, 5054, 6859, 7828, 10108, 13699, 13718, 27398, 27436, 37183, 48013, 54796, 74366, 96026, 148732, 192052, 260281, 520562, 706477, 1041124, 1412954, 2825908, 4945339, 9890678, 19781356]

約数ペア:

[(1, 19781356), (2, 9890678), (4, 4945339), (7, 2825908), (14, 1412954), (19, 1041124), (28, 706477), (38, 520562), (76, 260281), (103, 192052), (133, 148732), (206, 96026), (266, 74366), (361, 54796), (412, 48013), (532, 37183), (721, 27436), (722, 27398), (1442, 13718), (1444, 13699), (1957, 10108), (2527, 7828), (2884, 6859), (3914, 5054)]