21384916

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:460

約数の個数: 48

約数和(自身を含む): 44900352

約数和(自身を除く): 23515436

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 71, 124, 142, 217, 284, 347, 434, 497, 694, 868, 994, 1388, 1988, 2201, 2429, 4402, 4858, 8804, 9716, 10757, 15407, 21514, 24637, 30814, 43028, 49274, 61628, 75299, 98548, 150598, 172459, 301196, 344918, 689836, 763747, 1527494, 3054988, 5346229, 10692458, 21384916]

約数ペア:

[(1, 21384916), (2, 10692458), (4, 5346229), (7, 3054988), (14, 1527494), (28, 763747), (31, 689836), (62, 344918), (71, 301196), (124, 172459), (142, 150598), (217, 98548), (284, 75299), (347, 61628), (434, 49274), (497, 43028), (694, 30814), (868, 24637), (994, 21514), (1388, 15407), (1988, 10757), (2201, 9716), (2429, 8804), (4402, 4858)]