21012640

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{11939}}^1$

素因数の和:11965

約数の個数: 48

約数和(自身を含む): 54159840

約数和(自身を除く): 33147200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 160, 176, 220, 352, 440, 880, 1760, 11939, 23878, 47756, 59695, 95512, 119390, 131329, 191024, 238780, 262658, 382048, 477560, 525316, 656645, 955120, 1050632, 1313290, 1910240, 2101264, 2626580, 4202528, 5253160, 10506320, 21012640]

約数ペア:

[(1, 21012640), (2, 10506320), (4, 5253160), (5, 4202528), (8, 2626580), (10, 2101264), (11, 1910240), (16, 1313290), (20, 1050632), (22, 955120), (32, 656645), (40, 525316), (44, 477560), (55, 382048), (80, 262658), (88, 238780), (110, 191024), (160, 131329), (176, 119390), (220, 95512), (352, 59695), (440, 47756), (880, 23878), (1760, 11939)]