20123888

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{1249}}^1$

素因数の和:1329

約数の個数: 40

約数和(自身を含む): 41850000

約数和(自身を除く): 21726112

約数列:

[1, 2, 4, 8, 16, 19, 38, 53, 76, 106, 152, 212, 304, 424, 848, 1007, 1249, 2014, 2498, 4028, 4996, 8056, 9992, 16112, 19984, 23731, 47462, 66197, 94924, 132394, 189848, 264788, 379696, 529576, 1059152, 1257743, 2515486, 5030972, 10061944, 20123888]

約数ペア:

[(1, 20123888), (2, 10061944), (4, 5030972), (8, 2515486), (16, 1257743), (19, 1059152), (38, 529576), (53, 379696), (76, 264788), (106, 189848), (152, 132394), (212, 94924), (304, 66197), (424, 47462), (848, 23731), (1007, 19984), (1249, 16112), (2014, 9992), (2498, 8056), (4028, 4996)]