19991552

素因数分解:

$2^{10}\times 7^1\times {\mathrm{2789}}^1$

素因数の和:2816

約数の個数: 44

約数和(自身を含む): 45689040

約数和(自身を除く): 25697488

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 112, 128, 224, 256, 448, 512, 896, 1024, 1792, 2789, 3584, 5578, 7168, 11156, 19523, 22312, 39046, 44624, 78092, 89248, 156184, 178496, 312368, 356992, 624736, 713984, 1249472, 1427968, 2498944, 2855936, 4997888, 9995776, 19991552]

約数ペア:

[(1, 19991552), (2, 9995776), (4, 4997888), (7, 2855936), (8, 2498944), (14, 1427968), (16, 1249472), (28, 713984), (32, 624736), (56, 356992), (64, 312368), (112, 178496), (128, 156184), (224, 89248), (256, 78092), (448, 44624), (512, 39046), (896, 22312), (1024, 19523), (1792, 11156), (2789, 7168), (3584, 5578)]