21157668

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{743}}^1$

素因数の和:873

約数の個数: 72

約数和(自身を含む): 61746048

約数和(自身を除く): 40588380

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 113, 126, 226, 252, 339, 452, 678, 743, 791, 1017, 1356, 1486, 1582, 2034, 2229, 2373, 2972, 3164, 4068, 4458, 4746, 5201, 6687, 7119, 8916, 9492, 10402, 13374, 14238, 15603, 20804, 26748, 28476, 31206, 46809, 62412, 83959, 93618, 167918, 187236, 251877, 335836, 503754, 587713, 755631, 1007508, 1175426, 1511262, 1763139, 2350852, 3022524, 3526278, 5289417, 7052556, 10578834, 21157668]

約数ペア:

[(1, 21157668), (2, 10578834), (3, 7052556), (4, 5289417), (6, 3526278), (7, 3022524), (9, 2350852), (12, 1763139), (14, 1511262), (18, 1175426), (21, 1007508), (28, 755631), (36, 587713), (42, 503754), (63, 335836), (84, 251877), (113, 187236), (126, 167918), (226, 93618), (252, 83959), (339, 62412), (452, 46809), (678, 31206), (743, 28476), (791, 26748), (1017, 20804), (1356, 15603), (1486, 14238), (1582, 13374), (2034, 10402), (2229, 9492), (2373, 8916), (2972, 7119), (3164, 6687), (4068, 5201), (4458, 4746)]