21328428

素因数分解:

$2^2\times 3^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{397}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 56321776

約数和(自身を除く): 34993348

約数列:

[1, 2, 3, 4, 6, 11, 12, 22, 33, 37, 44, 66, 74, 111, 121, 132, 148, 222, 242, 363, 397, 407, 444, 484, 726, 794, 814, 1191, 1221, 1452, 1588, 1628, 2382, 2442, 4367, 4477, 4764, 4884, 8734, 8954, 13101, 13431, 14689, 17468, 17908, 26202, 26862, 29378, 44067, 48037, 52404, 53724, 58756, 88134, 96074, 144111, 161579, 176268, 192148, 288222, 323158, 484737, 576444, 646316, 969474, 1777369, 1938948, 3554738, 5332107, 7109476, 10664214, 21328428]

約数ペア:

[(1, 21328428), (2, 10664214), (3, 7109476), (4, 5332107), (6, 3554738), (11, 1938948), (12, 1777369), (22, 969474), (33, 646316), (37, 576444), (44, 484737), (66, 323158), (74, 288222), (111, 192148), (121, 176268), (132, 161579), (148, 144111), (222, 96074), (242, 88134), (363, 58756), (397, 53724), (407, 52404), (444, 48037), (484, 44067), (726, 29378), (794, 26862), (814, 26202), (1191, 17908), (1221, 17468), (1452, 14689), (1588, 13431), (1628, 13101), (2382, 8954), (2442, 8734), (4367, 4884), (4477, 4764)]