21037120

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^2\times {\mathrm{389}}^1$

素因数の和:432

約数の個数: 84

約数和(自身を含む): 54383940

約数和(自身を除く): 33346820

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 130, 160, 169, 208, 260, 320, 338, 389, 416, 520, 676, 778, 832, 845, 1040, 1352, 1556, 1690, 1945, 2080, 2704, 3112, 3380, 3890, 4160, 5057, 5408, 6224, 6760, 7780, 10114, 10816, 12448, 13520, 15560, 20228, 24896, 25285, 27040, 31120, 40456, 50570, 54080, 62240, 65741, 80912, 101140, 124480, 131482, 161824, 202280, 262964, 323648, 328705, 404560, 525928, 657410, 809120, 1051856, 1314820, 1618240, 2103712, 2629640, 4207424, 5259280, 10518560, 21037120]

約数ペア:

[(1, 21037120), (2, 10518560), (4, 5259280), (5, 4207424), (8, 2629640), (10, 2103712), (13, 1618240), (16, 1314820), (20, 1051856), (26, 809120), (32, 657410), (40, 525928), (52, 404560), (64, 328705), (65, 323648), (80, 262964), (104, 202280), (130, 161824), (160, 131482), (169, 124480), (208, 101140), (260, 80912), (320, 65741), (338, 62240), (389, 54080), (416, 50570), (520, 40456), (676, 31120), (778, 27040), (832, 25285), (845, 24896), (1040, 20228), (1352, 15560), (1556, 13520), (1690, 12448), (1945, 10816), (2080, 10114), (2704, 7780), (3112, 6760), (3380, 6224), (3890, 5408), (4160, 5057)]