21061405

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:213

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 6932195

約数列:

[1, 5, 19, 47, 53, 89, 95, 235, 265, 445, 893, 1007, 1691, 2491, 4183, 4465, 4717, 5035, 8455, 12455, 20915, 23585, 47329, 79477, 89623, 221699, 236645, 397385, 448115, 1108495, 4212281, 21061405]

約数ペア:

[(1, 21061405), (5, 4212281), (19, 1108495), (47, 448115), (53, 397385), (89, 236645), (95, 221699), (235, 89623), (265, 79477), (445, 47329), (893, 23585), (1007, 20915), (1691, 12455), (2491, 8455), (4183, 5035), (4465, 4717)]