21261680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{653}}^1$

素因数の和:714

約数の個数: 80

約数和(自身を含む): 55469664

約数和(自身を除く): 34207984

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 37, 40, 44, 55, 74, 80, 88, 110, 148, 176, 185, 220, 296, 370, 407, 440, 592, 653, 740, 814, 880, 1306, 1480, 1628, 2035, 2612, 2960, 3256, 3265, 4070, 5224, 6512, 6530, 7183, 8140, 10448, 13060, 14366, 16280, 24161, 26120, 28732, 32560, 35915, 48322, 52240, 57464, 71830, 96644, 114928, 120805, 143660, 193288, 241610, 265771, 287320, 386576, 483220, 531542, 574640, 966440, 1063084, 1328855, 1932880, 2126168, 2657710, 4252336, 5315420, 10630840, 21261680]

約数ペア:

[(1, 21261680), (2, 10630840), (4, 5315420), (5, 4252336), (8, 2657710), (10, 2126168), (11, 1932880), (16, 1328855), (20, 1063084), (22, 966440), (37, 574640), (40, 531542), (44, 483220), (55, 386576), (74, 287320), (80, 265771), (88, 241610), (110, 193288), (148, 143660), (176, 120805), (185, 114928), (220, 96644), (296, 71830), (370, 57464), (407, 52240), (440, 48322), (592, 35915), (653, 32560), (740, 28732), (814, 26120), (880, 24161), (1306, 16280), (1480, 14366), (1628, 13060), (2035, 10448), (2612, 8140), (2960, 7183), (3256, 6530), (3265, 6512), (4070, 5224)]