21041360

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 52377600

約数和(自身を除く): 31336240

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 109, 127, 152, 190, 218, 254, 304, 380, 436, 508, 545, 635, 760, 872, 1016, 1090, 1270, 1520, 1744, 2032, 2071, 2180, 2413, 2540, 4142, 4360, 4826, 5080, 8284, 8720, 9652, 10160, 10355, 12065, 13843, 16568, 19304, 20710, 24130, 27686, 33136, 38608, 41420, 48260, 55372, 69215, 82840, 96520, 110744, 138430, 165680, 193040, 221488, 263017, 276860, 526034, 553720, 1052068, 1107440, 1315085, 2104136, 2630170, 4208272, 5260340, 10520680, 21041360]

約数ペア:

[(1, 21041360), (2, 10520680), (4, 5260340), (5, 4208272), (8, 2630170), (10, 2104136), (16, 1315085), (19, 1107440), (20, 1052068), (38, 553720), (40, 526034), (76, 276860), (80, 263017), (95, 221488), (109, 193040), (127, 165680), (152, 138430), (190, 110744), (218, 96520), (254, 82840), (304, 69215), (380, 55372), (436, 48260), (508, 41420), (545, 38608), (635, 33136), (760, 27686), (872, 24130), (1016, 20710), (1090, 19304), (1270, 16568), (1520, 13843), (1744, 12065), (2032, 10355), (2071, 10160), (2180, 9652), (2413, 8720), (2540, 8284), (4142, 5080), (4360, 4826)]