21640430

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:393

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 26259730

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 53, 70, 95, 106, 133, 190, 265, 266, 307, 371, 530, 614, 665, 742, 1007, 1330, 1535, 1855, 2014, 2149, 3070, 3710, 4298, 5035, 5833, 7049, 10070, 10745, 11666, 14098, 16271, 21490, 29165, 32542, 35245, 40831, 58330, 70490, 81355, 81662, 113897, 162710, 204155, 227794, 309149, 408310, 569485, 618298, 1138970, 1545745, 2164043, 3091490, 4328086, 10820215, 21640430]

約数ペア:

[(1, 21640430), (2, 10820215), (5, 4328086), (7, 3091490), (10, 2164043), (14, 1545745), (19, 1138970), (35, 618298), (38, 569485), (53, 408310), (70, 309149), (95, 227794), (106, 204155), (133, 162710), (190, 113897), (265, 81662), (266, 81355), (307, 70490), (371, 58330), (530, 40831), (614, 35245), (665, 32542), (742, 29165), (1007, 21490), (1330, 16271), (1535, 14098), (1855, 11666), (2014, 10745), (2149, 10070), (3070, 7049), (3710, 5833), (4298, 5035)]