20459008

素因数分解:

$2^9\times {\mathrm{31}}^1\times {\mathrm{1289}}^1$

素因数の和:1338

約数の個数: 40

約数和(自身を含む): 42229440

約数和(自身を除く): 21770432

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 124, 128, 248, 256, 496, 512, 992, 1289, 1984, 2578, 3968, 5156, 7936, 10312, 15872, 20624, 39959, 41248, 79918, 82496, 159836, 164992, 319672, 329984, 639344, 659968, 1278688, 2557376, 5114752, 10229504, 20459008]

約数ペア:

[(1, 20459008), (2, 10229504), (4, 5114752), (8, 2557376), (16, 1278688), (31, 659968), (32, 639344), (62, 329984), (64, 319672), (124, 164992), (128, 159836), (248, 82496), (256, 79918), (496, 41248), (512, 39959), (992, 20624), (1289, 15872), (1984, 10312), (2578, 7936), (3968, 5156)]