21642800

素因数分解:

$2^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{887}}^1$

素因数の和:966

約数の個数: 60

約数和(自身を含む): 52908816

約数和(自身を除く): 31266016

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 200, 244, 305, 400, 488, 610, 887, 976, 1220, 1525, 1774, 2440, 3050, 3548, 4435, 4880, 6100, 7096, 8870, 12200, 14192, 17740, 22175, 24400, 35480, 44350, 54107, 70960, 88700, 108214, 177400, 216428, 270535, 354800, 432856, 541070, 865712, 1082140, 1352675, 2164280, 2705350, 4328560, 5410700, 10821400, 21642800]

約数ペア:

[(1, 21642800), (2, 10821400), (4, 5410700), (5, 4328560), (8, 2705350), (10, 2164280), (16, 1352675), (20, 1082140), (25, 865712), (40, 541070), (50, 432856), (61, 354800), (80, 270535), (100, 216428), (122, 177400), (200, 108214), (244, 88700), (305, 70960), (400, 54107), (488, 44350), (610, 35480), (887, 24400), (976, 22175), (1220, 17740), (1525, 14192), (1774, 12200), (2440, 8870), (3050, 7096), (3548, 6100), (4435, 4880)]