20398016

素因数分解:

$2^6\times {\mathrm{67}}^2\times {\mathrm{71}}^1$

素因数の和:217

約数の個数: 42

約数和(自身を含む): 41669208

約数和(自身を除く): 21271192

約数列:

[1, 2, 4, 8, 16, 32, 64, 67, 71, 134, 142, 268, 284, 536, 568, 1072, 1136, 2144, 2272, 4288, 4489, 4544, 4757, 8978, 9514, 17956, 19028, 35912, 38056, 71824, 76112, 143648, 152224, 287296, 304448, 318719, 637438, 1274876, 2549752, 5099504, 10199008, 20398016]

約数ペア:

[(1, 20398016), (2, 10199008), (4, 5099504), (8, 2549752), (16, 1274876), (32, 637438), (64, 318719), (67, 304448), (71, 287296), (134, 152224), (142, 143648), (268, 76112), (284, 71824), (536, 38056), (568, 35912), (1072, 19028), (1136, 17956), (2144, 9514), (2272, 8978), (4288, 4757), (4489, 4544)]