21357160

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48539}}^1$

素因数の和:48561

約数の個数: 32

約数和(自身を含む): 52423200

約数和(自身を除く): 31066040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48539, 97078, 194156, 242695, 388312, 485390, 533929, 970780, 1067858, 1941560, 2135716, 2669645, 4271432, 5339290, 10678580, 21357160]

約数ペア:

[(1, 21357160), (2, 10678580), (4, 5339290), (5, 4271432), (8, 2669645), (10, 2135716), (11, 1941560), (20, 1067858), (22, 970780), (40, 533929), (44, 485390), (55, 388312), (88, 242695), (110, 194156), (220, 97078), (440, 48539)]