18891719

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{349}}^1$

素因数の和:423

約数の個数: 32

約数和(自身を含む): 25536000

約数和(自身を除く): 6644281

約数列:

[1, 7, 11, 19, 37, 77, 133, 209, 259, 349, 407, 703, 1463, 2443, 2849, 3839, 4921, 6631, 7733, 12913, 26873, 46417, 54131, 72941, 90391, 142043, 245347, 510587, 994301, 1717429, 2698817, 18891719]

約数ペア:

[(1, 18891719), (7, 2698817), (11, 1717429), (19, 994301), (37, 510587), (77, 245347), (133, 142043), (209, 90391), (259, 72941), (349, 54131), (407, 46417), (703, 26873), (1463, 12913), (2443, 7733), (2849, 6631), (3839, 4921)]