21878560

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:458

約数の個数: 96

約数和(自身を含む): 58351104

約数和(自身を除く): 36472544

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 32, 40, 44, 55, 62, 80, 88, 110, 124, 155, 160, 176, 220, 248, 310, 341, 352, 401, 440, 496, 620, 682, 802, 880, 992, 1240, 1364, 1604, 1705, 1760, 2005, 2480, 2728, 3208, 3410, 4010, 4411, 4960, 5456, 6416, 6820, 8020, 8822, 10912, 12431, 12832, 13640, 16040, 17644, 22055, 24862, 27280, 32080, 35288, 44110, 49724, 54560, 62155, 64160, 70576, 88220, 99448, 124310, 136741, 141152, 176440, 198896, 248620, 273482, 352880, 397792, 497240, 546964, 683705, 705760, 994480, 1093928, 1367410, 1988960, 2187856, 2734820, 4375712, 5469640, 10939280, 21878560]

約数ペア:

[(1, 21878560), (2, 10939280), (4, 5469640), (5, 4375712), (8, 2734820), (10, 2187856), (11, 1988960), (16, 1367410), (20, 1093928), (22, 994480), (31, 705760), (32, 683705), (40, 546964), (44, 497240), (55, 397792), (62, 352880), (80, 273482), (88, 248620), (110, 198896), (124, 176440), (155, 141152), (160, 136741), (176, 124310), (220, 99448), (248, 88220), (310, 70576), (341, 64160), (352, 62155), (401, 54560), (440, 49724), (496, 44110), (620, 35288), (682, 32080), (802, 27280), (880, 24862), (992, 22055), (1240, 17644), (1364, 16040), (1604, 13640), (1705, 12832), (1760, 12431), (2005, 10912), (2480, 8822), (2728, 8020), (3208, 6820), (3410, 6416), (4010, 5456), (4411, 4960)]