21012280

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6329}}^1$

素因数の和:6423

約数の個数: 32

約数和(自身を含む): 47854800

約数和(自身を除く): 26842520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6329, 12658, 25316, 31645, 50632, 63290, 126580, 253160, 525307, 1050614, 2101228, 2626535, 4202456, 5253070, 10506140, 21012280]

約数ペア:

[(1, 21012280), (2, 10506140), (4, 5253070), (5, 4202456), (8, 2626535), (10, 2101228), (20, 1050614), (40, 525307), (83, 253160), (166, 126580), (332, 63290), (415, 50632), (664, 31645), (830, 25316), (1660, 12658), (3320, 6329)]