19991648

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{251}}^1$

素因数の和:411

約数の個数: 48

約数和(自身を含む): 41912640

約数和(自身を除く): 21920992

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 131, 152, 251, 262, 304, 502, 524, 608, 1004, 1048, 2008, 2096, 2489, 4016, 4192, 4769, 4978, 8032, 9538, 9956, 19076, 19912, 32881, 38152, 39824, 65762, 76304, 79648, 131524, 152608, 263048, 526096, 624739, 1052192, 1249478, 2498956, 4997912, 9995824, 19991648]

約数ペア:

[(1, 19991648), (2, 9995824), (4, 4997912), (8, 2498956), (16, 1249478), (19, 1052192), (32, 624739), (38, 526096), (76, 263048), (131, 152608), (152, 131524), (251, 79648), (262, 76304), (304, 65762), (502, 39824), (524, 38152), (608, 32881), (1004, 19912), (1048, 19076), (2008, 9956), (2096, 9538), (2489, 8032), (4016, 4978), (4192, 4769)]