21782560

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1249}}^1$

素因数の和:1373

約数の個数: 48

約数和(自身を含む): 51975000

約数和(自身を除く): 30192440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1249, 1744, 2180, 2498, 3488, 4360, 4996, 6245, 8720, 9992, 12490, 17440, 19984, 24980, 39968, 49960, 99920, 136141, 199840, 272282, 544564, 680705, 1089128, 1361410, 2178256, 2722820, 4356512, 5445640, 10891280, 21782560]

約数ペア:

[(1, 21782560), (2, 10891280), (4, 5445640), (5, 4356512), (8, 2722820), (10, 2178256), (16, 1361410), (20, 1089128), (32, 680705), (40, 544564), (80, 272282), (109, 199840), (160, 136141), (218, 99920), (436, 49960), (545, 39968), (872, 24980), (1090, 19984), (1249, 17440), (1744, 12490), (2180, 9992), (2498, 8720), (3488, 6245), (4360, 4996)]