21917440

素因数分解:

$2^8\times 5^1\times {\mathrm{17123}}^1$

素因数の和:17144

約数の個数: 36

約数和(自身を含む): 52502184

約数和(自身を除く): 30584744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 17123, 34246, 68492, 85615, 136984, 171230, 273968, 342460, 547936, 684920, 1095872, 1369840, 2191744, 2739680, 4383488, 5479360, 10958720, 21917440]

約数ペア:

[(1, 21917440), (2, 10958720), (4, 5479360), (5, 4383488), (8, 2739680), (10, 2191744), (16, 1369840), (20, 1095872), (32, 684920), (40, 547936), (64, 342460), (80, 273968), (128, 171230), (160, 136984), (256, 85615), (320, 68492), (640, 34246), (1280, 17123)]