20505128

素因数分解:

$2^3\times 7^2\times {\mathrm{17}}^2\times {\mathrm{181}}^1$

素因数の和:235

約数の個数: 72

約数和(自身を含む): 47772270

約数和(自身を除く): 27267142

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 49, 56, 68, 98, 119, 136, 181, 196, 238, 289, 362, 392, 476, 578, 724, 833, 952, 1156, 1267, 1448, 1666, 2023, 2312, 2534, 3077, 3332, 4046, 5068, 6154, 6664, 8092, 8869, 10136, 12308, 14161, 16184, 17738, 21539, 24616, 28322, 35476, 43078, 52309, 56644, 70952, 86156, 104618, 113288, 150773, 172312, 209236, 301546, 366163, 418472, 603092, 732326, 1206184, 1464652, 2563141, 2929304, 5126282, 10252564, 20505128]

約数ペア:

[(1, 20505128), (2, 10252564), (4, 5126282), (7, 2929304), (8, 2563141), (14, 1464652), (17, 1206184), (28, 732326), (34, 603092), (49, 418472), (56, 366163), (68, 301546), (98, 209236), (119, 172312), (136, 150773), (181, 113288), (196, 104618), (238, 86156), (289, 70952), (362, 56644), (392, 52309), (476, 43078), (578, 35476), (724, 28322), (833, 24616), (952, 21539), (1156, 17738), (1267, 16184), (1448, 14161), (1666, 12308), (2023, 10136), (2312, 8869), (2534, 8092), (3077, 6664), (3332, 6154), (4046, 5068)]