20919008

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{887}}^1$

素因数の和:975

約数の個数: 48

約数和(自身を含む): 45650304

約数和(自身を除く): 24731296

約数列:

[1, 2, 4, 8, 11, 16, 22, 32, 44, 67, 88, 134, 176, 268, 352, 536, 737, 887, 1072, 1474, 1774, 2144, 2948, 3548, 5896, 7096, 9757, 11792, 14192, 19514, 23584, 28384, 39028, 59429, 78056, 118858, 156112, 237716, 312224, 475432, 653719, 950864, 1307438, 1901728, 2614876, 5229752, 10459504, 20919008]

約数ペア:

[(1, 20919008), (2, 10459504), (4, 5229752), (8, 2614876), (11, 1901728), (16, 1307438), (22, 950864), (32, 653719), (44, 475432), (67, 312224), (88, 237716), (134, 156112), (176, 118858), (268, 78056), (352, 59429), (536, 39028), (737, 28384), (887, 23584), (1072, 19514), (1474, 14192), (1774, 11792), (2144, 9757), (2948, 7096), (3548, 5896)]