21534695

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:144

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 13301785

約数列:

[1, 5, 7, 13, 19, 35, 47, 53, 65, 91, 95, 133, 235, 247, 265, 329, 371, 455, 611, 665, 689, 893, 1007, 1235, 1645, 1729, 1855, 2491, 3055, 3445, 4277, 4465, 4823, 5035, 6251, 7049, 8645, 11609, 12455, 13091, 17437, 21385, 24115, 31255, 32383, 35245, 47329, 58045, 65455, 81263, 87185, 91637, 161915, 226681, 236645, 331303, 406315, 458185, 615277, 1133405, 1656515, 3076385, 4306939, 21534695]

約数ペア:

[(1, 21534695), (5, 4306939), (7, 3076385), (13, 1656515), (19, 1133405), (35, 615277), (47, 458185), (53, 406315), (65, 331303), (91, 236645), (95, 226681), (133, 161915), (235, 91637), (247, 87185), (265, 81263), (329, 65455), (371, 58045), (455, 47329), (611, 35245), (665, 32383), (689, 31255), (893, 24115), (1007, 21385), (1235, 17437), (1645, 13091), (1729, 12455), (1855, 11609), (2491, 8645), (3055, 7049), (3445, 6251), (4277, 5035), (4465, 4823)]