21507618

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{661}}^1$

素因数の和:723

約数の個数: 64

約数和(自身を含む): 51477120

約数和(自身を除く): 29969502

約数列:

[1, 2, 3, 6, 11, 17, 22, 29, 33, 34, 51, 58, 66, 87, 102, 174, 187, 319, 374, 493, 561, 638, 661, 957, 986, 1122, 1322, 1479, 1914, 1983, 2958, 3966, 5423, 7271, 10846, 11237, 14542, 16269, 19169, 21813, 22474, 32538, 33711, 38338, 43626, 57507, 67422, 115014, 123607, 210859, 247214, 325873, 370821, 421718, 632577, 651746, 741642, 977619, 1265154, 1955238, 3584603, 7169206, 10753809, 21507618]

約数ペア:

[(1, 21507618), (2, 10753809), (3, 7169206), (6, 3584603), (11, 1955238), (17, 1265154), (22, 977619), (29, 741642), (33, 651746), (34, 632577), (51, 421718), (58, 370821), (66, 325873), (87, 247214), (102, 210859), (174, 123607), (187, 115014), (319, 67422), (374, 57507), (493, 43626), (561, 38338), (638, 33711), (661, 32538), (957, 22474), (986, 21813), (1122, 19169), (1322, 16269), (1479, 14542), (1914, 11237), (1983, 10846), (2958, 7271), (3966, 5423)]