21333640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{229}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 51418800

約数和(自身を除く): 30085160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 137, 170, 229, 274, 340, 458, 548, 680, 685, 916, 1096, 1145, 1370, 1832, 2290, 2329, 2740, 3893, 4580, 4658, 5480, 7786, 9160, 9316, 11645, 15572, 18632, 19465, 23290, 31144, 31373, 38930, 46580, 62746, 77860, 93160, 125492, 155720, 156865, 250984, 313730, 533341, 627460, 1066682, 1254920, 2133364, 2666705, 4266728, 5333410, 10666820, 21333640]

約数ペア:

[(1, 21333640), (2, 10666820), (4, 5333410), (5, 4266728), (8, 2666705), (10, 2133364), (17, 1254920), (20, 1066682), (34, 627460), (40, 533341), (68, 313730), (85, 250984), (136, 156865), (137, 155720), (170, 125492), (229, 93160), (274, 77860), (340, 62746), (458, 46580), (548, 38930), (680, 31373), (685, 31144), (916, 23290), (1096, 19465), (1145, 18632), (1370, 15572), (1832, 11645), (2290, 9316), (2329, 9160), (2740, 7786), (3893, 5480), (4580, 4658)]