19659420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{9929}}^1$

素因数の和:9955

約数の個数: 72

約数和(自身を含む): 65061360

約数和(自身を除く): 45401940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 9929, 19858, 29787, 39716, 49645, 59574, 89361, 99290, 109219, 119148, 148935, 178722, 198580, 218438, 297870, 327657, 357444, 436876, 446805, 546095, 595740, 655314, 893610, 982971, 1092190, 1310628, 1638285, 1787220, 1965942, 2184380, 3276570, 3931884, 4914855, 6553140, 9829710, 19659420]

約数ペア:

[(1, 19659420), (2, 9829710), (3, 6553140), (4, 4914855), (5, 3931884), (6, 3276570), (9, 2184380), (10, 1965942), (11, 1787220), (12, 1638285), (15, 1310628), (18, 1092190), (20, 982971), (22, 893610), (30, 655314), (33, 595740), (36, 546095), (44, 446805), (45, 436876), (55, 357444), (60, 327657), (66, 297870), (90, 218438), (99, 198580), (110, 178722), (132, 148935), (165, 119148), (180, 109219), (198, 99290), (220, 89361), (330, 59574), (396, 49645), (495, 39716), (660, 29787), (990, 19858), (1980, 9929)]