20408128

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1291}}^1$

素因数の和:1335

約数の個数: 56

約数和(自身を含む): 45943520

約数和(自身を除く): 25535392

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 64, 76, 104, 152, 208, 247, 304, 416, 494, 608, 832, 988, 1216, 1291, 1976, 2582, 3952, 5164, 7904, 10328, 15808, 16783, 20656, 24529, 33566, 41312, 49058, 67132, 82624, 98116, 134264, 196232, 268528, 318877, 392464, 537056, 637754, 784928, 1074112, 1275508, 1569856, 2551016, 5102032, 10204064, 20408128]

約数ペア:

[(1, 20408128), (2, 10204064), (4, 5102032), (8, 2551016), (13, 1569856), (16, 1275508), (19, 1074112), (26, 784928), (32, 637754), (38, 537056), (52, 392464), (64, 318877), (76, 268528), (104, 196232), (152, 134264), (208, 98116), (247, 82624), (304, 67132), (416, 49058), (494, 41312), (608, 33566), (832, 24529), (988, 20656), (1216, 16783), (1291, 15808), (1976, 10328), (2582, 7904), (3952, 5164)]