21390138

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:121

約数の個数: 144

約数和(自身を含む): 61746048

約数和(自身を除く): 40355910

約数列:

[1, 2, 3, 6, 7, 9, 11, 14, 18, 21, 22, 23, 33, 42, 46, 61, 63, 66, 69, 77, 99, 121, 122, 126, 138, 154, 161, 183, 198, 207, 231, 242, 253, 322, 363, 366, 414, 427, 462, 483, 506, 549, 671, 693, 726, 759, 847, 854, 966, 1089, 1098, 1281, 1342, 1386, 1403, 1449, 1518, 1694, 1771, 2013, 2178, 2277, 2541, 2562, 2783, 2806, 2898, 3542, 3843, 4026, 4209, 4554, 4697, 5082, 5313, 5566, 6039, 7381, 7623, 7686, 8349, 8418, 9394, 9821, 10626, 12078, 12627, 14091, 14762, 15246, 15433, 15939, 16698, 19481, 19642, 22143, 25047, 25254, 28182, 29463, 30866, 31878, 38962, 42273, 44286, 46299, 50094, 51667, 58443, 58926, 66429, 84546, 88389, 92598, 103334, 108031, 116886, 132858, 138897, 155001, 169763, 175329, 176778, 216062, 277794, 310002, 324093, 339526, 350658, 465003, 509289, 648186, 930006, 972279, 1018578, 1188341, 1527867, 1944558, 2376682, 3055734, 3565023, 7130046, 10695069, 21390138]

約数ペア:

[(1, 21390138), (2, 10695069), (3, 7130046), (6, 3565023), (7, 3055734), (9, 2376682), (11, 1944558), (14, 1527867), (18, 1188341), (21, 1018578), (22, 972279), (23, 930006), (33, 648186), (42, 509289), (46, 465003), (61, 350658), (63, 339526), (66, 324093), (69, 310002), (77, 277794), (99, 216062), (121, 176778), (122, 175329), (126, 169763), (138, 155001), (154, 138897), (161, 132858), (183, 116886), (198, 108031), (207, 103334), (231, 92598), (242, 88389), (253, 84546), (322, 66429), (363, 58926), (366, 58443), (414, 51667), (427, 50094), (462, 46299), (483, 44286), (506, 42273), (549, 38962), (671, 31878), (693, 30866), (726, 29463), (759, 28182), (847, 25254), (854, 25047), (966, 22143), (1089, 19642), (1098, 19481), (1281, 16698), (1342, 15939), (1386, 15433), (1403, 15246), (1449, 14762), (1518, 14091), (1694, 12627), (1771, 12078), (2013, 10626), (2178, 9821), (2277, 9394), (2541, 8418), (2562, 8349), (2783, 7686), (2806, 7623), (2898, 7381), (3542, 6039), (3843, 5566), (4026, 5313), (4209, 5082), (4554, 4697)]