16780785

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^2\times {\mathrm{79}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 33598080

約数和(自身を除く): 16817295

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 79, 85, 105, 119, 147, 237, 245, 255, 289, 357, 395, 553, 595, 735, 833, 867, 1185, 1343, 1445, 1659, 1785, 2023, 2499, 2765, 3871, 4029, 4165, 4335, 6069, 6715, 8295, 9401, 10115, 11613, 12495, 14161, 19355, 20145, 22831, 28203, 30345, 42483, 47005, 58065, 65807, 68493, 70805, 114155, 141015, 159817, 197421, 212415, 329035, 342465, 479451, 799085, 987105, 1118719, 2397255, 3356157, 5593595, 16780785]

約数ペア:

[(1, 16780785), (3, 5593595), (5, 3356157), (7, 2397255), (15, 1118719), (17, 987105), (21, 799085), (35, 479451), (49, 342465), (51, 329035), (79, 212415), (85, 197421), (105, 159817), (119, 141015), (147, 114155), (237, 70805), (245, 68493), (255, 65807), (289, 58065), (357, 47005), (395, 42483), (553, 30345), (595, 28203), (735, 22831), (833, 20145), (867, 19355), (1185, 14161), (1343, 12495), (1445, 11613), (1659, 10115), (1785, 9401), (2023, 8295), (2499, 6715), (2765, 6069), (3871, 4335), (4029, 4165)]