21811984

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{20347}}^1$

素因数の和:20422

約数の個数: 20

約数和(自身を含む): 42893584

約数和(自身を除く): 21081600

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 20347, 40694, 81388, 162776, 325552, 1363249, 2726498, 5452996, 10905992, 21811984]

約数ペア:

[(1, 21811984), (2, 10905992), (4, 5452996), (8, 2726498), (16, 1363249), (67, 325552), (134, 162776), (268, 81388), (536, 40694), (1072, 20347)]