21813520

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{127}}^1$

素因数の和:272

約数の個数: 80

約数和(自身を含む): 54282240

約数和(自身を除く): 32468720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 113, 127, 152, 190, 226, 254, 304, 380, 452, 508, 565, 635, 760, 904, 1016, 1130, 1270, 1520, 1808, 2032, 2147, 2260, 2413, 2540, 4294, 4520, 4826, 5080, 8588, 9040, 9652, 10160, 10735, 12065, 14351, 17176, 19304, 21470, 24130, 28702, 34352, 38608, 42940, 48260, 57404, 71755, 85880, 96520, 114808, 143510, 171760, 193040, 229616, 272669, 287020, 545338, 574040, 1090676, 1148080, 1363345, 2181352, 2726690, 4362704, 5453380, 10906760, 21813520]

約数ペア:

[(1, 21813520), (2, 10906760), (4, 5453380), (5, 4362704), (8, 2726690), (10, 2181352), (16, 1363345), (19, 1148080), (20, 1090676), (38, 574040), (40, 545338), (76, 287020), (80, 272669), (95, 229616), (113, 193040), (127, 171760), (152, 143510), (190, 114808), (226, 96520), (254, 85880), (304, 71755), (380, 57404), (452, 48260), (508, 42940), (565, 38608), (635, 34352), (760, 28702), (904, 24130), (1016, 21470), (1130, 19304), (1270, 17176), (1520, 14351), (1808, 12065), (2032, 10735), (2147, 10160), (2260, 9652), (2413, 9040), (2540, 8588), (4294, 5080), (4520, 4826)]