21142880

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{293}}^1$

素因数の和:360

約数の個数: 96

約数和(自身を含む): 56010528

約数和(自身を除く): 34867648

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 41, 44, 55, 80, 82, 88, 110, 160, 164, 176, 205, 220, 293, 328, 352, 410, 440, 451, 586, 656, 820, 880, 902, 1172, 1312, 1465, 1640, 1760, 1804, 2255, 2344, 2930, 3223, 3280, 3608, 4510, 4688, 5860, 6446, 6560, 7216, 9020, 9376, 11720, 12013, 12892, 14432, 16115, 18040, 23440, 24026, 25784, 32230, 36080, 46880, 48052, 51568, 60065, 64460, 72160, 96104, 103136, 120130, 128920, 132143, 192208, 240260, 257840, 264286, 384416, 480520, 515680, 528572, 660715, 961040, 1057144, 1321430, 1922080, 2114288, 2642860, 4228576, 5285720, 10571440, 21142880]

約数ペア:

[(1, 21142880), (2, 10571440), (4, 5285720), (5, 4228576), (8, 2642860), (10, 2114288), (11, 1922080), (16, 1321430), (20, 1057144), (22, 961040), (32, 660715), (40, 528572), (41, 515680), (44, 480520), (55, 384416), (80, 264286), (82, 257840), (88, 240260), (110, 192208), (160, 132143), (164, 128920), (176, 120130), (205, 103136), (220, 96104), (293, 72160), (328, 64460), (352, 60065), (410, 51568), (440, 48052), (451, 46880), (586, 36080), (656, 32230), (820, 25784), (880, 24026), (902, 23440), (1172, 18040), (1312, 16115), (1465, 14432), (1640, 12892), (1760, 12013), (1804, 11720), (2255, 9376), (2344, 9020), (2930, 7216), (3223, 6560), (3280, 6446), (3608, 5860), (4510, 4688)]