21904036

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{197}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 50694336

約数和(自身を除く): 28790300

約数列:

[1, 2, 4, 7, 11, 14, 19, 22, 28, 38, 44, 76, 77, 133, 154, 197, 209, 266, 308, 361, 394, 418, 532, 722, 788, 836, 1379, 1444, 1463, 2167, 2527, 2758, 2926, 3743, 3971, 4334, 5054, 5516, 5852, 7486, 7942, 8668, 10108, 14972, 15169, 15884, 26201, 27797, 30338, 41173, 52402, 55594, 60676, 71117, 82346, 104804, 111188, 142234, 164692, 284468, 288211, 497819, 576422, 782287, 995638, 1152844, 1564574, 1991276, 3129148, 5476009, 10952018, 21904036]

約数ペア:

[(1, 21904036), (2, 10952018), (4, 5476009), (7, 3129148), (11, 1991276), (14, 1564574), (19, 1152844), (22, 995638), (28, 782287), (38, 576422), (44, 497819), (76, 288211), (77, 284468), (133, 164692), (154, 142234), (197, 111188), (209, 104804), (266, 82346), (308, 71117), (361, 60676), (394, 55594), (418, 52402), (532, 41173), (722, 30338), (788, 27797), (836, 26201), (1379, 15884), (1444, 15169), (1463, 14972), (2167, 10108), (2527, 8668), (2758, 7942), (2926, 7486), (3743, 5852), (3971, 5516), (4334, 5054)]