20969768

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 42588180

約数和(自身を除く): 21618412

約数列:

[1, 2, 4, 8, 19, 38, 53, 76, 106, 137, 152, 212, 274, 361, 424, 548, 722, 1007, 1096, 1444, 2014, 2603, 2888, 4028, 5206, 7261, 8056, 10412, 14522, 19133, 20824, 29044, 38266, 49457, 58088, 76532, 98914, 137959, 153064, 197828, 275918, 395656, 551836, 1103672, 2621221, 5242442, 10484884, 20969768]

約数ペア:

[(1, 20969768), (2, 10484884), (4, 5242442), (8, 2621221), (19, 1103672), (38, 551836), (53, 395656), (76, 275918), (106, 197828), (137, 153064), (152, 137959), (212, 98914), (274, 76532), (361, 58088), (424, 49457), (548, 38266), (722, 29044), (1007, 20824), (1096, 19133), (1444, 14522), (2014, 10412), (2603, 8056), (2888, 7261), (4028, 5206)]