21513618

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1511}}^1$

素因数の和:1639

約数の個数: 48

約数和(自身を含む): 53778816

約数和(自身を除く): 32265198

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 113, 126, 226, 339, 678, 791, 1017, 1511, 1582, 2034, 2373, 3022, 4533, 4746, 7119, 9066, 10577, 13599, 14238, 21154, 27198, 31731, 63462, 95193, 170743, 190386, 341486, 512229, 1024458, 1195201, 1536687, 2390402, 3073374, 3585603, 7171206, 10756809, 21513618]

約数ペア:

[(1, 21513618), (2, 10756809), (3, 7171206), (6, 3585603), (7, 3073374), (9, 2390402), (14, 1536687), (18, 1195201), (21, 1024458), (42, 512229), (63, 341486), (113, 190386), (126, 170743), (226, 95193), (339, 63462), (678, 31731), (791, 27198), (1017, 21154), (1511, 14238), (1582, 13599), (2034, 10577), (2373, 9066), (3022, 7119), (4533, 4746)]